Allium siculum (Nectaroscordum) – Exotic Umbrella Blooms

Bring exotic elegance and late spring colour to your garden with Allium siculum, a hardy, clump-forming bulbous perennial formerly known as Nectaroscordum siculum. With its tufted, upright habit and see-through stems, it works beautifully at the front of borders, in gravel gardens, or paired with late tulips, lavender, and muted irises.

Key Features

• Flower Colour: Antique rose, cream, and muted green
• Foliage: Grey-green, narrow, keeled, strap-shaped leaves
• Height: 1.2 m (4’)
• Spread: 10 cm (4”) in 1–2 years
• Flowering Season: Late spring to early summer
• Seed Heads: Pointed, twisted upward in autumn; excellent for arrangements
• Pollinators: Attracts bees and other beneficial insects
• Hardiness: Fully hardy

Planting & Care

• Planting Time: September–November
• Depth & Spacing: 15 cm deep, slightly pointed end up, basal plate below
• Position: Full sun; tolerates partial shade and exposure
• Soil: Fertile, light, well-drained; sandy soils preferred
• Maintenance: Self-sows freely; minimal care needed once established

Why Choose Keans Claremorris?

• Premium Irish-grown bulbs suited to local conditions
• Expert guidance for planting and care
• Reliable nationwide delivery of healthy, ready-to-grow stock
• Supporting Irish horticulture while ensuring top-quality plants

Plant Allium siculum for an exotic, architectural feature, pollinator-friendly flowers, and decorative seed heads that provide interest from late spring into autumn.