We're offering you a Allium Collection 100 Bulbs for £6.99, saving you up to 42% off Thompson and Morgan's's price of £11.99 (correct as of 16.09.2025).

Planting Now

Add drama and colour to your garden with this expertly curated Allium Collection of 100 bulbs!

• Alliums are hardy perennial bulbs in the onion family (Amaryllidaceae), prized for their architectural blooms and ease of care.
• This collection features four distinct varieties: Allium sphaerocephalon (oval purple-green heads), Allium moly (golden-yellow star-shaped flowers), Allium roseum (delicate pale pink cups), and the bold 'Purple Sensation' (large globes of starry purple flowers).
• Mature heights range from 15cm (6") for Allium moly up to an impressive 90cm (36") for 'Purple Sensation', allowing you to create dynamic layers in your planting scheme.

Why Choose Alliums?

• Seasonal Interest: Alliums bridge the gap between spring bulbs and summer perennials, ensuring continuous colour.
• Diverse Colour Palette: Enjoy a mix of purple, yellow, and pink blooms that attract pollinators.
• Tough & Reliable: Once established, alliums are drought-tolerant and require minimal attention.

Growing Guide

• Planting Time: Plant bulbs in autumn for late spring to early summer blooms.
• Site & Soil: Choose a sunny spot with well-drained soil. Alliums thrive in most soil types but dislike waterlogging.
• Caring For Your Alliums: Water well after planting. Once established, alliums require little additional watering. Deadhead spent flowers to prolong display or leave seed heads for architectural interest.
• Mature Size: Space bulbs according to variety—smaller types like moly at 5cm (2") apart; taller types such as 'Purple Sensation' at 10cm (4").

Design Tips & Companion Planting

• Plant in groups for bold impact or weave through ornamental grasses for a naturalistic look.
• Pair with perennials like Nepeta, Salvia, or hardy Geraniums for complementary colour and texture.
• Add to gravel gardens or rockeries where their upright stems create vertical accents.

FAQs

• When is the best time to plant allium bulbs?
  The ideal time is autumn, before the ground freezes—typically September to November in the UK.
• How tall do these alliums grow?
  The collection includes varieties from 15cm (6") up to 90cm (36") in height.
• Do alliums need special care?
  No—plant in well-drained soil in full sun. Water after planting; minimal care is needed once established.