Leucojum Gravetye Giant

Description

Leucojum ‘Gravetye Giant’ – summer snowflake

Botanical name: Leucojum aestivum ‘Gravetye Giant’
Common names: Summer snowflake, Loddon lily
Family: Amaryllidaceae
Plant type: Bulbous perennial
Habit: Clump-forming, upright
Pot size: 1 litre pot
Eventual size: Approx. 60–90cm tall × 8–10cm spread per bulb
Foliage: Strap-shaped, glossy green leaves; dies back after flowering
Flowers: Nodding, bell-shaped white flowers tipped with green, spring (April–May)
Scent: Faintly scented
Aspect / light: Full sun to partial shade
Soil: Moist, fertile; tolerates damp ground; any pH
Hardiness: RHS H5 (hardy, to about −15°C); USDA zones 4–8
Exposure: Sheltered or exposed
Native range: Species native to Europe and western Asia
Toxicity / pet & child safety: Toxic if eaten — all parts, especially the bulbs, are harmful to people, cats, dogs and horses; sap may irritate skin

Leucojum ‘Gravetye Giant’ is a robust summer snowflake bearing nodding, bell-shaped white flowers tipped with green on tall, elegant stems in spring. It naturalises beautifully in moist soil and light shade beneath trees and shrubs, and by water.

GardenAdvice notes

A vigorous, clump-forming bulb in the daffodil family, ‘Gravetye Giant’ is a superior selection of the summer snowflake, taller and more free-flowering than the ordinary form. Despite the name, it flowers in spring, and thrives in the moist, even damp conditions that many bulbs dislike, making it invaluable for waterside and woodland-edge planting.

Growing & planting

Plant the bulbs in autumn in moist, fertile soil in sun or partial shade, setting them about 10cm deep and 10cm apart. It is happiest where the soil stays reliably moist and even tolerates seasonally damp ground, so it is ideal near ponds and streams or in a moisture-retentive border. Clumps establish and naturalise over time.

Care & maintenance

Very easy once settled. Keep the soil moist, especially in spring, and allow the foliage to die down naturally after flowering so the bulbs can build up for next year. Lift and divide congested clumps only when flowering starts to decline. An annual mulch of leaf mould or compost is appreciated.

Propagation

• Division: Lift and divide congested clumps as the leaves die down after flowering, replanting immediately.
• Offsets: Detach naturally produced offset bulbs when dividing and replant at the same depth.
• Seed: Sow fresh seed in autumn; seed-raised bulbs take several years to reach flowering size.

Pests & diseases

Generally trouble-free. Narcissus bulb fly and slugs can occasionally be a nuisance, and bulbs may rot in ground that bakes dry then floods. Reliably moist but not stagnant soil suits it best.

Uses in the garden

Superb for naturalising in moist borders, damp grass, pond and stream margins and light woodland, where the tall white flowers shine in spring. The blooms are also good for cutting.

Wildlife value

The early flowers offer a valuable source of nectar for bees and other pollinators emerging in spring.

Toxicity & safety

Like others in the daffodil family, summer snowflake is toxic if eaten — all parts, and especially the bulbs, are harmful to people, cats, dogs and horses, and the sap can irritate skin. Wear gloves when handling and plant where pets are unlikely to dig up and chew the bulbs.

GardenAdvice tip

Don’t mistake this for a dry-loving bulb — ‘Gravetye Giant’ actually revels in moisture, so give it the damp spot by the pond or in a heavy, moisture-retentive border where snowdrops or tulips would sulk. Leave the clumps undisturbed for a few years and they will bulk up into a really generous spring display.

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