Allium 'Giganteum' (Giant Allium)

Dispatch begins week of 14 September
Autumn planting varieties are seasonal and become available at the start of September. We will then prepare your order and begin dispatch during the week beginning Monday 14 September.

Choose your pack size Display scale; savings vs smallest pack
1 bulb
Planting coverageCreates one focal point
£5.49
£5.49 each
3 bulbs
Most popular Creates a balanced architectural group
£14.99
£5.00 each
Save 9% each
5 bulbs
Best value Creates a balanced architectural group
£21.99
£4.40 each
Save 20% each

Free delivery on £40+ orders

Carbon-Neutral Delivery

Bloom or Bust Guarantee

Each spherical flower head can reach around 10cm across and is formed from scores of tiny star-shaped blooms.

Allium 'Giganteum' is a magnificent statement allium, lifting generous globes of lilac-pink flowers above the border on tall, assured stems. Its architectural scale gives late-spring planting a wonderfully considered air, while the individual starry florets remain light enough to mingle gracefully with perennials.

These premium 18/+ bulbs are particularly effective planted in measured groups through sunny borders. The flowers are much admired by pollinators, make superb cut stems and leave handsome seed heads for dried arrangements.

Botanical name Allium giganteum
Flower colour Lilac-Pink
Bulb size 18/+
Established height 150-200cm
Established spread 10-50cm
Plant spacing 25-30cm
Leaf colour Grey-green
Habit Upright
Life cycle Perennial
Hardiness Fully Hardy
Years to establish 1-2 years
Sunlight Full-Sun
Position Sheltered
Suitable for Borders, Containers, Cut Flower Garden, Dried Flower Arrangements, Pollinator Gardens
Soil acidity Any
Soil moisture Well-drained
Soil type Chalk, Loam, Sand
RHS Award (AGM) No
Growing skill Easy to grow
Pollinator-friendly Yes
Deer resistant Yes

Where to Plant:

Allium 'Giganteum' performs best in full sun in a sheltered border with fertile, well-drained soil. Give its tall stems a position where the flower heads can rise through lower perennials without being exposed to strong winds.

How to Plant:

Plant the 18/+ bulbs from September to December at roughly three times their own depth, usually 15-20cm deep, with the pointed end facing upwards. Space bulbs 25-30cm apart and improve heavy soil with grit before planting.

Aftercare:

Water after planting, then keep the soil only lightly moist during active growth. Allow the foliage to yellow and die back naturally after flowering so the bulb can replenish its reserves. Leave the sculptural seed heads standing or cut them for dried arrangements.

Planting and Flowering Calendar

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Key Features

Packed in paper

Packed peat-free

Great for Shade

Attracts wildlife

Perfect for pots

Good for cutting

Allium 'Giganteum' (Giant Allium) - Harding & Bloom

Allium 'Giganteum' (Giant Allium)

£5.49

£5.49

The Finest Bulbs

We partner with elite growers to provide only top-size, professional-grade bulbs. Bigger bulbs mean stronger roots and more spectacular blooms.

A Greener Thumb

We are committed to a healthier planet, using sustainable growing practices and mindfully chosen, recyclable packaging.

An Unrivaled Selection

Discover an extensive collection of both timeless classics and rare, exclusive varieties to create a garden that is uniquely yours.

Our Bloom Guarantee

If a bulb or plant fails to perform in its first growing season after the care instructions have been followed, we will normally offer a replacement or store credit for the affected item. This does not affect your statutory rights.

Kind Words from Our Gardeners

Arrived quickly and well-packaged. Planted them in some pots on the patio and they all came up. Look beautiful. Thank you!

Careane Wallace

Oxfordshire, UK

The bulbs arrived beautifully packaged and you could just tell they were excellent quality. We had the most wonderful display of daffodils this spring on our patio. Simply stunning. Will definitely be ordering again

David P

Kent, UK

I ordered the mixed hyacinth collection and the scent in my garden this April was absolutely heavenly. Every single bulb produced a strong, beautiful flower and the colours were stunning together. A fantastic purchase, I'll be back for more next year!

Eleanor R

Somerset