Allium ‘White Giant’ – Elegant White Flower Spheres for Late Spring Structure
Allium ‘White Giant’ is a striking ornamental onion, producing large, perfectly rounded flower heads in crisp, pure white. Flowering in late spring, the globe-shaped blooms rise on tall, sturdy stems, bringing height, clarity, and architectural structure to borders.
The luminous white spheres contrast beautifully with rich green foliage and darker-flowered companions, making them particularly effective in contemporary planting schemes or white-themed gardens. Planted in groups, they create dramatic vertical accents that repeat rhythmically through mixed borders.
Highly attractive to bees and other pollinators, ‘White Giant’ supports garden wildlife while delivering strong visual impact. The blooms are long-lasting and can be left to form decorative seed heads for extended interest, or cut for fresh and dried arrangements.
Thriving in full sun and well-drained soil, this hardy variety is reliable and low maintenance. Once established, it returns each year with minimal care, adding consistent late spring presence.
Bold yet refined, Allium ‘White Giant’ is an excellent choice for gardeners seeking height, structure, and luminous colour in late spring planting.
Seasonal Highlights
Spring: Upright foliage emerges.
Late Spring: Large white spherical blooms open.
Early Summer: Seed heads provide architectural interest.
Winter: Bulbs remain dormant underground.
Key Features
Pure white flower heads – Clean, striking colour.
Tall, upright stems – Adds height to borders.
Architectural form – Strong structural presence.
Pollinator-friendly – Loved by bees.
Long-lasting blooms – Suitable for cutting and drying.
Perfect For
Mixed borders – Back-of-border impact.
White gardens – Crisp seasonal highlights.
Contemporary planting – Clean structural lines.
Wildlife gardens – Nectar-rich blooms.
Cutting gardens – Fresh and dried displays.
Growing Tips
Sun/Position: Full sun.
Soil: Free-draining soil; avoid winter waterlogging.
Hardiness: Fully hardy across the UK.
Care: Plant bulbs in autumn at around 15–20cm deep; allow foliage to die back naturally.
Does the height include the pot?
No, we measure from the top of the pot to the tip of the plant except for some of the instant planted screens, in this case it will be stated in the description
How long does delivery take?
Most orders are delivered in just a few days, Smaller items are often sent with Parcelforce on a next day service, Larger items should allow up to 10 days due to the size of the items they often have to be sent on our own transport.
Where will you leave my plants?
We will leave your order at the front of your property, Parcelforce may
leave your items in a safe place if you let us know, Pallet couriers
will require a flat hard surface to deliver to, no gravel or soil, a
driveway or parking spot would be best. Most importantly Deliveries by
pallet courier will require access for a large truck (bin lorry sized)
to get near the delivery point. Deliveries sent on our own transport may come in a small van or larger truck.
