We're offering you a 60 or 90 Allium Purple Sensation Bulbs for £8.99, saving you up to 55% off Thompson and Morgan's's price of £19.99 (correct as of 21.10.2025).

late-spring garden alliums

Transform your garden with Allium 'Purple Sensation' – a show-stopping perennial bulb renowned for its bold, spherical blooms and RHS Award of Garden Merit status.

• Botanical Profile: Allium 'Purple Sensation' is a hardy perennial from the onion family, producing striking violet-purple flower globes up to 8cm (3") across. These star-shaped flowers rise above slender stems, creating a dramatic architectural effect in late spring to early summer.
• Garden Impact: Ideal for adding height, colour, and texture to mixed borders, cottage gardens, and contemporary planting schemes. The seedheads persist into autumn, offering extended visual interest and structure.
• Pollinator Friendly: Attracts bees and butterflies, supporting garden biodiversity.

How to Grow Allium 'Purple Sensation'

• Planting Time: Plant bulbs in autumn (September to November) for blooms the following late spring (May–June).
• Sun & Soil: Prefers full sun and well-drained soil. Tolerates a range of soil types, but avoid waterlogged sites.
• Spacing: Space bulbs 10–15cm apart and 10cm deep for best results.
• Care Tips: Minimal maintenance required. Allow foliage to die back naturally after flowering to feed the bulb for next year. Deadhead spent blooms or leave seedheads for autumn interest.
• Hardiness: Fully hardy in UK gardens (USDA zones 4–8).

Design & Companion Planting Ideas

• Combine with ornamental grasses, Nepeta, Salvia, or hardy geraniums for layered borders.
• Excellent for cutting – enjoy fresh or dried in arrangements.
• Mix with other spring bulbs like tulips and narcissus for a succession of colour.

FAQs

• When is the best time to plant Allium bulbs?
  Plant in autumn (September to November) for flowers the following late spring.
• How tall do Allium 'Purple Sensation' grow?
  Each stem reaches up to 90cm (36") tall with a spread of about 10cm (4").
• Do Alliums need special care?
  Alliums are low-maintenance. Ensure well-drained soil and full sun, and allow foliage to die back after flowering for best results.