Quick read / the essentials on our Leucojum Gravetye Giant bulbs
Professional florists, discover with Floriverse an exceptional horticultural opportunity with the Leucojum Gravetye Giant , a remarkable variety for cut flowers as well as for landscaping. This selection of the Summer Snowflake is appreciated for its tall flower stems (up to 60 cm) , its pure white hanging flowers edged with green and its great hardiness , down to -20°C.
Ideal for wet areas or shaded borders, it guarantees a spring flowering of consistent quality. As a wholesale supplier specializing in flower bulbs , we offer you professional quality bulbs, available in sizes 10/12 and 12/+, from conventional, untreated or certified organic production.
Whether you're looking for performance in cut flowers or durability for naturalization, our selection adapts to all your technical itineraries. Don't wait any longer to buy Leucojum Gravetye Giant bulbs at the best price, online or with a personalized quote. Trusting Floriverse means relying on logistical rigor, expert advice, and a secure supply for the success of your cultivation.
Our commitment: to support flower growers with a comprehensive and competitive offering. Consider purchasing Leucojum Gravetye Giant bulbs now from a specialist flower bulb wholesaler to enhance your plots next spring. Our bulbs are carefully selected to ensure consistent flowering and excellent yields. And with every order, you benefit from the expertise of a specialist flower bulb wholesaler serving French producers.
Introducing our Leucojum range
At Floriverse , we offer a wide range of Leucojum flower bulbs for floriculture professionals looking for performance, aesthetics and consistent production. Our offer includes:
- Certified organic bulbs , complying with the strictest specifications.
-
Bulbs not treated after harvest , suitable for low residue production.
- Conventional bulbs , from specialist nurseries ensuring optimal yield.
Our selection includes Leucojum aestivum and Leucojum aestivum 'Gravetye Giant' , known for its large flowers.
The cultivation of Leucojum in France
Analysis of the Leucojum cut flower market for professional floriculturists in France
The global cut flower market is growing with an estimated value of $32.6 billion in 2025 and a projected CAGR of 6.3% through 2034. In France, the market share of cut flowers increased from 33.5% to 38.1% between 2017 and 2020, despite a temporary decline due to the health crisis.
Position of the French market and dependence on imports
France relies on imports for over 80% of its cut flowers. This situation offers an opportunity to promote local crops like Leucojum, with significant logistical and quality advantages.
Leucojum on the French cut flower market
Features and business potential
- White bell-shaped flowers, edged in green, with a sophisticated aesthetic.
- Early flowering: February to May depending on the variety.
- Good vase life, ideal for floristry.
- Variety 'Gravetye Giant' : larger flowers, very attractive.
Current commercial offer
Untreated bulbs : size 10/12, available from September to November 2025.
Organic 'Gravetye Giant' bulbs (size 12/+), decreasing prices:
- 50 to 99 bulbs: €0.82 excluding VAT
- 100 to 249 bulbs: €0.75 excluding VAT
- 250 to 499 bulbs: €0.69 excluding VAT
- 500+: price on quote
Distinction between organic and conventional market
Organic market trends
The organic segment is growing rapidly, driven by a growing demand for sustainable products. Leucojum, thanks to its ease of cultivation and hardiness, is very well suited to organic farming.
Competitive advantages of Leucojum
-
Conventional : low input requirements, good yield.
-
Organic : simple cultivation, not very susceptible to disease, suitable for humid soils.
Tips for market positioning
Priority business targets
-
Independent florists : 58% of spending on cut flowers.
-
Large-scale distribution : 14% of purchases, increasing trend.
-
Seasonal events : birthdays, local festivals, ceremonies.
Differentiation strategies
- Highlighting the French origin .
- Double organic and conventional offer.
-
Technical support to optimize cut flower cultivation.
Our sales arguments
As a specialist in flower bulbs and supplier of Leucojum for professional florists , we offer wholesale and online sales with unbeatable value for money . Our Leucojum bulbs are produced by specialist nurseries and delivered throughout France, with careful delivery within 15 days in season or upon advance reservation.
Our sales department is responsive , with a response and quote within 48 hours . We offer free, personalized quotes , accompanied by a complete technical itinerary to maximize yield and quality. With our dedicated technical support , agricultural supply becomes simple and seamless , without complications.
Horticultural value of Leucojum for flower production
The genus Leucojum offers horticulture and landscape professionals a bulbous plant of great interest, combining elegance , hardiness and ease of cultivation in suitable conditions. Mainly represented by two major species on the market, Leucojum vernum and Leucojum aestivum , this genus is distinguished by its characteristic spring flowering and its ability to naturalize , offering varied perspectives of use for massifs , borders , and wetlands .
Species available on the professional market
Botanically, the genus Leucojum belongs to the Amaryllidaceae family, classified in the subfamily Amaryllidoideae and the order Asparagales . The two most common species for cultivation and ornamentation are Leucojum vernum L., also known by the common name of "Summer Snowdrop" or "Spring Snowflake", and Leucojum aestivum L., called "Summer Snowflake" or "Summer Snowflake". It is important to note that the genus Leucojum currently only has these two major species, the others having been reclassified in the genus Acis .
Botanical characteristics and varietal identification
Taxonomy of the genus Leucojum
Leucojum is a bulbous plant, with a true bulb , dry and protected by a tunic . It is specifically a tunicated bulb , different from a corm , tuber or rhizome , characteristic of the Amaryllidaceae . The shape of the bulb is generally ovoid to subglobose , slightly pointed at the upper end and with a flat base from which the contractile roots emerge. The outer envelope, or tunic, is papery and varies in color from white to light brown , ensuring the protection of the internal scales which constitute the nutrient reserves . Inside, the bulb has several fleshy , thick, pure white scales surrounding the central bud .
Typology and morphology of the bulb
Bulb dimensions vary depending on the species: Leucojum aestivum has a bulb about 2 to 3 cm in diameter , while that of Leucojum vernum is smaller, usually 1.5 to 2.5 cm in diameter . The height of the bulb is often comparable to its diameter. Handling these bulbs requires some care to preserve the integrity of their protective tunic.
Morphological parameters of the plant in cultivation
Foliage: structure, shape and persistence
The foliage of Leucojum grows in an upright clump , often described as vase -shaped. The leaves are long, narrow, and resemble grasses or herbs . Over time, the bulbs multiply and form dense, compact clumps of foliage , whose organized structure shows no invasive tendency, contributing to the plant's neat appearance in landscaping. The leaves typically reach a length of about 30 cm (12 inches) and a width of 2.5 cm (1 inch). The entire clump can reach up to 45 cm (18 inches), with some varieties reaching 60 cm (24 inches). The foliage color is a dark, grassy green , forming an elegant contrast with the pendulous white flowers . The texture is smooth, similar to that of ornamental grasses. Leucojum is a long-lived perennial . Its foliage appears in spring, accompanies flowering and persists until it yellows and fades naturally, marking the entry into summer dormancy of the bulb.
Flowering: architecture, size and fragrance
Leucojum flowers are distinguished by their bell-like shape , always pendulous or nodding, offering a simple and elegant silhouette. Unlike Galanthus , the six tepals (perianth segments) of Leucojum flowers are of equal length . Flower size varies slightly depending on the species: those of Leucojum aestivum are considered "quite large," measuring about 2 to 3 cm long , while those of Leucojum vernum are of similar size, usually between 2 and 2.5 cm long . The dominant color is pure white . Each tepal is often marked with a small green spot at its tip, a detail particularly visible in Leucojum aestivum . The number of flowers per stem differs significantly between the two species: Leucojum aestivum bears an inflorescence (unilateral umbel) comprising 3 to 7 flowers per stem , whereas Leucojum vernum generally has a single terminal flower per stem, rarely two. Regarding the scent , it is generally very discreet, or even absent, and is not considered a notable characteristic in technical descriptions.
Height and general shape at maturity
The general habit of mature Leucojum is upright and erect . The flower stems rise vertically above the basal foliage . The leaves are also erect or slightly arched, forming a compact, upright, herbaceous clump. Mature height varies from 10 to 30 cm for Leucojum vernum (about 20 cm on average) and from 30 to 60 cm for Leucojum aestivum (50 cm for standard types, up to 60 cm for varieties such as 'Gravetye Giant' ). Although the flowers are pendulous , this does not detract from the overall upright appearance of the plant.
Origin, biotopes and natural ecological conditions
Geographic distribution and climatic tolerances
The two main species, Leucojum vernum and Leucojum aestivum , are native to Europe . Leucojum aestivum is native to much of central and southern Europe , including France, Germany, Italy, Hungary, and the Iberian Peninsula, also extending into western Asia and the Caucasus . Leucojum vernum is found primarily in central, western, and southern Europe , with a distribution including Austria, Belgium, Switzerland, Germany, France, Italy, Romania, the Balkans, Poland, Ukraine, and Slovakia.
Soil type and natural exposure
These plants thrive in temperate climates, characterized by cold winters (tolerance to temperatures below 0°C) and moderately warm summers . They require sustained humidity in spring , a key period for their growth and flowering . In terms of altitude, Leucojum vernum can grow up to 1,600 meters , while Leucojum aestivum is generally found in plains or at medium altitudes, being common in lowland wetlands . The preferred biotope for both species is wetlands such as riverbanks , flooded meadows , ditches , shady clearings and deciduous forests . They prefer soils rich in organic matter , whether clayey or sandy , capable of retaining moisture while ensuring good drainage . Shade to partial shade is necessary, as these species have difficulty withstanding drought , especially in spring.
Life cycle, sustainability and multiplication in place
Cultural longevity and naturalization
Leucojum is a perennial , bulbous plant . Its typical annual cycle sees the leaves emerge in the autumn , persist throughout the winter and spring, and then flower in the spring . After flowering, the foliage turns yellow and disappears in the summer , with the bulb then going dormant in the soil. The foliage is therefore deciduous .
One of the major advantages of Leucojum for professionals is its longevity in place . A plantation can last without requiring renewal for between 10 and 20 years , or even more, if the soil conditions ( fresh , light , rich ) and exposure ( partial shade to sun ) are favorable. The plant naturalizes easily by forming "daughter" bulbs around the mother bulb, which allows the clumps to grow over the seasons and ensures the sustainability of the colony . To maintain the vigor of the clumps and stimulate flowering, division is recommended every 3 to 8 years depending on the density. Propagation can also be done by sowing , although this method is slower and more uncertain for professional production.
Propagation: division, sowing and micropropagation
The propagation of Leucojum aestivum can be carried out by different technical methods . Bulb division is one of the most effective and common. It consists of separating the bulbils ( offsets ) that form around the main bulb. This method is preferred to maintain the genetic fidelity of the cultivars. To encourage the production of cloves , the bulbs can be planted less deeply or the basal plate can be cut . Bulbils resulting from division can take 2 to 4 years before flowering .
Seed propagation is also possible. It involves collecting and sowing seeds after they have matured. Seeds are usually sown on the surface. However, plants obtained by seed may not faithfully reproduce the characteristics of the parent cultivars. It is also a slower method, as flowering may not occur for several years .
For large-scale professional production , in vitro propagation ( micropropagation ) offers significant advantages in terms of speed and volume . Because traditional methods are slow and laborious , in vitro culture allows for rapid bulb formation in a controlled environment, producing large numbers of genetically identical plants in a small space.
Combining bulb division for varietal stability and micropropagation for rapid stock increase is the most effective approach for professionals. Division is recommended every 3 to 5 years .
Adaptation to cold and hardiness
Leucojum aestivum is known for its excellent hardiness , capable of withstanding very low temperatures . Depending on the source, it can withstand temperatures down to -29°C , -20°C or -15°C . This cold tolerance makes it perfectly suited to cultivation in most French regions , including the coldest, where it can withstand the harsh winters by remaining dormant . Its hardiness is generally associated with USDA zones 4 to 8 or 4 to 9 depending on the source.
Flowering periods according to species
The flowering periods of the two main species are distinct, which allows for an interesting staggering for professionals. Leucojum vernum flowers in early spring , generally from late February to March . Its flowering lasts about 3 to 4 weeks and can vary slightly depending on climatic conditions. Leucojum aestivum flowers later, from April to May . Its flowering can begin as early as early April and extend until the end of May , lasting on average 4 to 6 weeks . These periods are important for planning production cycles and sales strategies .
Varietal descriptors and commercial selection
Specific characteristics of Leucojum vernum
Leucojum vernum grows to 20-40 cm tall and 10-15 cm wide. Its dark green leaves are up to 30 cm long and 2.5 cm wide. Flowering occurs in early spring , followed by summer dormancy . The flowers , usually 3-6 per stem , are white , bell-shaped , with tepals marked green at the tips. The type form is var. vernum , native from Belgium to Ukraine . A notable variety is var. carpathicum , distinguished by yellow instead of green markings on the tepals, and is native to the Carpathian Mountains .
Specific characteristics of Leucojum aestivum
Leucojum aestivum grows to 30-45 cm in height. Its foliage is dark green , grass -like, about 30 cm long and 2.5 cm wide, forming an upright clump . It usually flowers later than L. vernum . Each stem bears 2 to 5 (sometimes up to 8 ) pendulous, bell-shaped white flowers . A particularly popular variety is 'Gravetye Giant' , noted for its height of up to 60 cm and rich foliage .
Common technical characteristics of species of the genus Leucojum (strict sense) include hollow flower stems (unlike the solid-stemmed genus Acis ), white flowers with green or yellow markings on all six tepals, and relatively large seeds ( 5-7 mm in diameter). The leaves are broader than those of the genus Acis , measuring 5-20 mm for L. aestivum and up to 25 mm for L. vernum . These species are perennial , medium-growing , low-maintenance , propagate well by division , and are resistant to deer and rabbits .
Agronomic requirements for professional cultivation
Optimal soil and moisture conditions
For successful cultivation of Leucojum bulbs in France, several factors are decisive.
Regarding the soil , these plants show a marked preference for soils that retain moisture well . A heavy, clayey soil , fresh and rich in organic matter is considered optimal. A well-structured humus-rich soil favors their development. These bulbs are remarkably adapted to fairly heavy soils and even tolerate temporarily waterlogged soils in winter , which is a distinctive advantage . The ideal pH is around neutral to slightly calcareous , imperatively non-acidic . The need for humidity is constant : the soil must remain fresh and never dry out , even during the summer dormancy period of the bulb. Although tolerant of humidity, good drainage is necessary to prevent rot .
Recommended light exposure
Optimal light exposure varies from full sun to partial shade . A site receiving 4 to 6 hours of direct sunlight per day is ideal. They adapt well to a sunny or part-day sunny exposure, typical of undergrowth edges . Dense shade where direct light is almost absent is not recommended as it can reduce flowering . Some atmospheric humidity is also appreciated during the growing season.
Water requirements by cultivation phase
Water requirements are moderate to regular during growth and spring flowering , keeping the soil constantly fresh and never drying out . After planting, generous watering is crucial for rooting . During summer dormancy , slight drought is tolerated once the foliage has faded. The amount of useful water can vary from 45 mm in very sandy soils to more than 120 mm in finer soils . Sudden excess water may result in runoff or percolation . Regular assessment of requirements , potentially covered by natural rainfall , is necessary.
Fertilization adapted to Leucojum bulbs
Regarding fertilization , Leucojum is not very demanding . A light addition of compost or organic fertilizer in the fall can promote flowering . Slow-release organic amendments are preferred. An annual application in the fall is generally sufficient. Fertilization intensity can be adjusted according to the density of the plantations . Adding mycorrhizae to the plantation can improve acclimatization .
Open ground planting techniques
The ideal planting time for Leucojum bulbs in France is in autumn , from September to December , before the frost . The bulbs should be planted as soon as they are received to avoid drying out , especially for Leucojum vernum , whose bulbs are particularly sensitive to dry storage .
Planting depth varies depending on bulb size : 10 cm for small bulbs (diameter ≤ coin), 15-25 cm for larger ones . Other sources recommend 12-15 cm , or 8-10 cm for standard varieties. The tip of the bulb should always be facing upwards. Spacing between bulbs is about 10 cm , or even 12-15 cm , or 20 cm for Leucojum aestivum . For a mass effect , planting in groups is recommended (at least 15 bulbs ). Adding bone meal to the planting hole (about 60 ml per large bulb ) can promote good rooting .
Cultural practices for maintenance and longevity
Post-planting maintenance and weeding
Leucojum is relatively easy to maintain, making it a popular plant for its low maintenance requirements . Minimal weeding is required, mainly around the bulbs at the beginning of the season to limit competition . Applying a 2 to 3 cm thick mulch ( wood chips , straw ) significantly reduces weeding requirements while maintaining humidity . Unlike other bulbs, deadheading is not always required. If you want to avoid self-seeding , the flower stems can be cut after flowering, but the foliage must be left in place until it has completely yellowed , generally 6 to 8 weeks after flowering . This phase allows the bulb to replenish its reserves .
Foliage management and division of clumps
Lifting and dividing clumps is only necessary every 3 to 5 years , or when flowering decreases due to excessive density . Division is ideally done in early summer , after the foliage has yellowed . Separated bulbs should be replanted immediately or stored briefly in a cool, dry, dark place . Replanting is done 10-15 cm deep with similar spacing .
Phytosanitary protection and monitoring of bulbs
Parasites and diseases to watch out for
Leucojum , like other bulbous plants, can be affected by certain pests and diseases , although they are generally considered resistant to rodents, rabbits and deer . Among the pests, the narcissus fly ( Merodon equestris ) can cause damage by digging into the bulbs, as well as nematodes ( Ditylenchus dipsaci ) which deform and rot the tissues. Rodents (voles, field mice) can also consume the bulbs. The main diseases include gray mold ( Botrytis cinerea ) in cases of excess moisture, fusarium wilt ( Fusarium oxysporum , F. solani ) causing browning and death of the bulbs, and various viruses (such as potyviruses ) responsible for yellowing and leaf deformation .
Visual indicators of crop health
To assess plant health and detect deficiencies or stress , several indicators are useful. Bright, uniform green foliage is a sign of good health. Discolorations (yellowing) may indicate nitrogen deficiency or excess moisture . Leaf spots or necrosis suggest water stress , pest stress or specific deficiencies (e.g., potassium ). Leaf shape (withered, curved) and slowed growth may indicate a nutritional problem , pathogenic stress or unsuitable soil . A healthy bulb should be firm , free from soft areas, spots or exudates ; soft or brown areas indicate rot . The weight and size of harvested bulbs , the quality of the root system (white to beige, well developed) are also key indicators . Soil ( optimal pH 6.0-7.0 , electrical conductivity 0.5-1.2 mS/cm ) and foliar analyses can complete the diagnosis.
Prevention, hygiene and prophylactic methods
Preventive measures are crucial: crop rotation (avoid Amaryllidaceae for 4-5 years ), use of healthy bulbs , heat treatment of bulbs ( 43-45°C for 2-3 hours ) against nematodes and fungi , and humidity control during storage ( dry , ventilated , 17-20°C ). Good cultural hygiene ( cleaning of equipment , removal of infected plant debris ) is essential.
Leucojum in landscaping and public management
Planting density and planting areas
Leucojum aestivum , with its 30 to 45 cm height and its evergreen dark green foliage , offers excellent potential for various landscaping projects . In beds , it is recommended to plant 10-15 bulbs/m² for a dense visual effect, in association with other undergrowth plants or early perennials . Groups of at least 20-30 bulbs are particularly impactful. In borders , its moderate height makes it effective in the first line. The optimal spacing is 10-15 cm between bulbs, planted at a depth of 8-10 cm .
Advantages in humid environments and difficult soils
Its tolerance of temporarily soggy soils makes it an ideal choice for wetlands , pond banks or damp valleys , where it can gradually naturalise . It also excels in undergrowth under deciduous trees , taking advantage of the spring light . A density of 7-10 bulbs/m² is suggested in shaded areas.
Long-term maintenance strategy for communities
The naturalization capacity of Leucojum aestivum is remarkable, particularly in clayey to sandy soils , rich in organic matter and moist . It can effectively colonize wetlands, with an estimated annual expansion rate of 5-10% in area and a 15-20% increase in the number of bulbs under optimal conditions. Naturalization is favored by not mowing before the foliage yellows (minimum 6 weeks after flowering ) and consistently cool to moist soils . Full establishment generally takes 3 to 5 years .
For communities and large public spaces , Leucojums offer many technical and economic advantages . Their ease of maintenance is a major asset, being described as "maintenance-free" . They require little weeding and minimal management . Their excellent naturalization capacity allows the creation of lasting flowering colonies without major intervention. Their adaptability to heavy , clayey or compact soils, as well as to a wide pH range (5.5 to 8) , makes them suitable for the often difficult soils of public developments . They even thrive in soils rich in nitrates and humus . Used in undergrowth , edges , pond borders or rockeries , they enhance a variety of spaces and provide staggered flowering depending on the species, helping to reduce maintenance costs .
Interest in cut flowers and commercial development
Leucojum has characteristics to consider for cut flower production . Stem height is a key factor: Leucojum vernum has shorter stems of 10-20 cm , which are less suitable. Leucojum aestivum offers longer stems , reaching 40-60 cm , which is sufficient for commercial use. Each bulb produces 2 to 5 flower stems , a good yield . The flowers , in drooping white bells , are distinctive. Spring flowering ( L. vernum: Feb-Apr , L. aestivum: Apr-Jun ) allows production over a strategic period . Leucojum aestivum is fragrant . Although vase life is not precisely quantified in the sources, the fleshy structure of the leaves and the robustness of the stems suggest good potential . For cut flowers, Leucojum aestivum seems the most promising due to its height and number of stems . Harvesting L. aestivum flowers is ideally done when two-thirds of the flowers are open to optimize vase life ( 7 to 10 days with floral preservative ). It should be noted that the stems produce a liquid that can affect the life of other mixed flowers.
Honey attractiveness and ecological role
Leucojum aestivum is an attractive plant for pollinators , although it is of secondary importance compared to other spring honey-producing species. During its flowering ( April-May ), the flowers offer pollen and nectar to early spring insects . The main visitors are bees (domestic and wild) and hoverflies . Occasionally, bumblebees and butterflies can be observed. The bell-shaped structure makes resources accessible to relatively short-tongued insects . Nectar production per flower is estimated at 0.05-0.2 mg/day (approximate data based on closely related species). The beekeeping interest is therefore moderate , but the plant plays a supporting role for spring biodiversity .
Plant associations for aesthetic and functional purposes
For complementary aesthetic and cultural effects , Leucojum aestivum combines well with other plants with similar requirements or an interesting floral succession . Belonging to the Amaryllidaceae family, it combines naturally with Daffodils ( Narcissus spp. ). Fritillaries ( Fritillaria meleagris ), which also appreciate moist soils , create a contrast . Primroses ( Primula spp. ), especially those adapted to humid areas , provide a colorful carpet at the same time. For succession , Galanthus nivalis ( snowdrops ) bloom before, while Muscari armeniacum can flower simultaneously, creating a spectacular blue/white contrast . After Leucojum has flowered, native ferns ( Matteuccia struthiopteris , Osmunda regalis ) can grow to mask the yellowing foliage . Technically, associations with sedges ( Carex pendula ) stabilize wet soils , and legumes ( Lathyrus vernus ) can improve fertility . Pulmonaria officinalis , with its early flowering , also attracts pollinators .
Ornamental appearance after flowering and foliage management
After flowering , the ornamental interest of Leucojum lies mainly in the technical management of its foliage . It is crucial not to cut the foliage until it has yellowed and faded naturally . This post-flowering period is essential to allow the bulb to replenish its nutrient reserves in preparation for the next flowering. It is also the ideal time for dividing the clumps , which can be carried out " in green ", when the foliage is still present. Over time, the clumps that form naturally in place retain a decorative rustic appearance .
Crop rotation in bulb production
Leucojum belongs to the "Miscellaneous" crop rotation group. Being a bulbous perennial that can remain in place for several years ( 3-5 years before division ), rotation is mainly relevant when replanting or commercially using plots . It is recommended to avoid planting Leucojum after other plants of the Amaryllidaceae family to reduce the risk of disease . A rest period of 2 to 3 years is recommended before replanting Leucojum on the same plot.
Agronomic responses to climatic stress
Drought Management
In the face of prolonged drought , irrigation is essential to keep the soil cool , aiming for 25-30 mm of water per week during active growth, with deep waterings . A heavy mulch ( 7-10 cm organic ) helps to retain moisture . Incorporating organic matter ( 5-7 kg/m² ) and potentially water retainers is beneficial. Clay to loamy soils are preferable to very sandy soils .
Measures in case of intense frost
Faced with very harsh winters , despite the hardiness (down to -34°C ), winter protection can include deeper planting ( 10-12 cm ) and winter mulching ( 8-10 cm ) after the soil has frozen. Choosing sheltered sites , east or south-east orientation , and planting at the foot of deciduous trees are relevant measures. Not pruning faded foliage in autumn provides natural insulation . Planting in groups of at least 3 bulbs can improve collective resistance .
Vernalization and floral induction
Leucojum , like Leucojum vernum and Leucojum aestivum , are geophytic plants that actually require a cold period to induce their spring flowering . Their cycle includes a summer dormancy . Planting in the fall allows the bulbs to benefit from this natural winter vernalization . In controlled cultivation or for forcing , it is necessary to provide a cold period of at least 6 to 8 weeks at temperatures between 0°C and 7°C . Allowing the foliage to yellow after flowering is crucial for the accumulation of reserves necessary for floral induction the following year.
Grow in pots or in a sheltered environment
Growing in pots or under cover is possible for professional needs , although open ground is preferred for its stability . Leucojum is hardy and adaptable . For growing in pots, a humus-rich, fresh, well-drained , pH-neutral substrate is required. A mixture of 60-70% rich potting soil and 30-40% coarse sand or perlite is recommended. The pot should be at least 20-25 cm deep to plant the bulbs at 15 cm . Watering should keep the substrate slightly moist without stagnation , as Leucojum fears excess water . Under cover, good aeration is important to avoid fungal diseases . Watering is reduced during dormancy but the substrate should not dry out completely . Spacing in pots should be at least 10 cm . Light fertilization ( balanced fertilizer type 5-10-5 or 4-10-6 NPK , 30-40 g/m² ) on the surface is applicable during planting . Protection against extreme frost is recommended in pots.
Toxicological aspects and natural resistances
Leucojum , like other plants in the Amaryllidaceae family , probably contains alkaloids that can make them toxic if ingested in large quantities . This information is relevant for areas where livestock might have access to them. Their natural resistance to rodents, rabbits and deer is an asset for professional cultivation . Leucojum aestivum is particularly suitable for humid areas provided the bulbs are not constantly submerged , being above the high water line . It is an excellent choice for naturalizing in areas of subdued light .
Performance and professional production potential
Precise information on average yield ( stems/flowers per m² or per bulb ) in professional cultivation is not detailed in the sources provided. However, it is mentioned that Leucojum is grown on a large scale for cut flower production , which confirms its commercial potential . Its ability to naturalize and form flowering colonies suggests good propagation potential and increasing yield over time. The standard size for commercial bulbs of Leucojum aestivum is 10/12 mm , and bulb size influences vigor and flowering . Larger bulbs (≥ 14/16 mm ) produce more robust stems and more flowers . A 10/12 bulb size allows for proper flowering from the first year , with a recommended density of 40-60 bulbs/m² . A mature bulb can produce 2-3 secondary bulbs per division. For accurate yield data , it would be wise to consult experienced growers .
To summarize: Our Leucojum Gravetye Giant Bulbs
In conclusion, Leucojum Gravetye Giant stands out as a safe bet for the production of cut flowers in France. Its late flowering (April-May) , its long and robust stems , and its good vase life make it a popular variety among florists. Its adaptation to humid soils , its ability to naturalize and its tolerance to cold down to -20°C further reinforce its agronomic interest.
Thanks to our expertise as a specialist wholesale supplier of Flower Bulbs , we offer this variety in sizes suitable for professional cultivation, with an offer of organic or conventional bulbs according to your technical needs. Let yourself be guided by our know-how to buy Leucojum Gravetye Giant Bulbs with complete peace of mind. Our batches are available for direct delivery or by reservation, with decreasing prices for professionals.
Choosing Floriverse means choosing a specialist wholesale supplier of flower bulbs committed to the success of your crops and the sustainability of your floriculture projects. Don't hesitate to buy Leucojum Gravetye Giant bulbs today to enhance your plots, secure your production and meet the growing demand for local and sustainable flowers.
For any order, our team will support you with personalized technical advice and a tailor-made quote, reflecting our commitment as a wholesale supplier specializing in Flower Bulbs .
Limited stock - Buy now and get it delivered when you're ready to plant
