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Allium CollectionOrnamental Onion

4 Options from £8.99

Hardy Bulb
What is Hardy Bulb?
Plant that grows from an underground storage organ.
Generally supplied in a dormant condition with no top growth.
Capable of withstanding outdoor winter temperatures down to -15C.
18 Reviews

T&M Promise - Guaranteed to flower in the first year from planting

Create an explosion of colour with these easy to grow alliums

A magnet for bees and butterflies

Attractive seed heads

20 allium bulb mix £8.99 Despatch: within 14 days
100 allium bulb mixSave £24.96 £44.95 £19.99 Despatch: within 14 days
100 allium bulb mix £14.99 Despatch: within 14 days
200 allium bulb mixSave £4.99 £29.98 £24.99 Despatch: by end of October
Please note: This product cannot be delivered outside the United Kingdom.
Description How to Grow More Info Delivery Reviews

Upright stems add a strong vertical accent to cottage garden borders. These magnificent allium bulbs produce an explosion of colour, followed by architectural seedheads that create a spectacular autumn display. Undemanding and easy to grow, these magnificent allium flowers are also excellent for cutting.

  • Allium aflatunese - Dense globes of mauve-purple flowers measuring up to 10cm (4") across in early summer. Height: 90cm (35"). Spread: 10cm (4"). Bulb size 4/5.
  • Allium sphaerocephalon- An understated allium with unusual oval shaped, purple green flower heads, that associates beautifully with swaying grasses. Height: 50cm to 1 metre (20" to 40"). Spread: 8cm (3").Bulb size 4/5.
  • Allium caeruleum - Bright blue globes of starry flowers are carried on stiff upright stems. Height: 60cm (24"). Spread: 8cm (3"). Bulb size 4/5.
  • Allium 'Purple Sensation' - Globes of starry purple flowers that measure up to 8cm (3") across. Height: 90cm (36"). Spread: 10cm (4"). Bulb size 10/12.

20 bulbs (contains 3 x Aflatunese, 10 x Caeruleum, 5 x Spherocephalon, 2 x Purple Sensation)
100 bulbs (contains 16 x Aflatunese, 24 x Caeruleum, 50 x Spherocephalon, 10 x Purple Sensation)
200 bulbs (contains 32 x Aflatunese, 48 x Caeruleum, 100 x Spherocephalon, 20 x Purple Sensation)

Useful links:

How to grow bulbs, corms and tubers


Cottage Gardens, Wildlife Gardens, Low Maintenance Garden, Cut Flower Garden

Hardy

Full sun

Up to 60cm (23.6in)|60cm (24in)

Up to 10cm (3.9in)|10cm (4in)

Easy for all|easy

Easy for all|easy

Thompson & Morgan strives to ensure that all its plants are delivered to you in the perfect condition for planting. Sadly, the time it takes to deliver to certain locations in the UK means that we can't guarantee this, so regretfully we are unable to ship live plants to the following areas: GY, HS, IV41-IV49, IV51, IV55-56, KW15-KW17, PA34, PA41-48, PA60-PA78, PA80, PH40-PH44, TR21-TR24, ZE1-ZE3.

20 Allium Bulb Mix (T80903)
100 Allium Bulb Mix (T11846)
100 Allium Bulb Mix (T11846B)
200 Allium Bulb Mix (T65242)

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Flowering Months
Alliums require little maintenance. Leave stems of faded allium flowers intact to enjoy their spectacular seedheads in autumn. Divide overcrowded clumps of alliums after flowering. Caution: irritant to skin and eyes.
Alliums thrive in light sandy, well drained soil in full sun. Avoid planting in cold wet soils as the bulbs are prone to rot in these conditions. Plant allium bulbs at a depth of 10cm (4") and a distance of 10cm (4") apart. A slow release fertilizer can be added to poor soils at the time of planting to improve fertility. When growing alliums, plant them where the leaves of other plants will cover the base of their stems. This will hide the old foliage which dies back before flowering begins.

Delivery

Seeds and garden supplies will normally be delivered within the time period stated against each product as detailed above. Plants, bulbs, corms, tubers, shrubs, trees, potatoes etc are delivered at the appropriate time for planting and will be stated on the product page or in your order acknowledgement page and email.

Orders for packets of seed incur a delivery charge of £1.95.

Orders which include any other products will incur a delivery charge of £4.95.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £6.90 will apply - regardless of the number of items ordered.

Large items may incur a higher delivery charge - this will be displayed in your shopping basket.

Please see our Delivery page for further details and details of any surcharges that may apply to certain destinations.

Satisfaction Guaranteed

For your complete peace of mind, our Home and Garden products may be returned to us within 30 days of purchase for a refund of the purchase price. Items must be returned unused, at your cost and in mint condition. All items carry a manufacturer's 12 month defects warranty.