Allium Gladiator Spring Bulbs

Name: Allium Gladiator Spring Bulbs
Brand: Carbeth Plants
SKU: ALLIUMGLADIATOR-1

Spring Flowering - UK Hardy Pollinator Friendly

Ornamental Onion

£7.99

Pot Size Guide

size guide

The height of all of our plants is measured from the base of the pot.

Pot Size	Pot Diameter	Pot Height
6cm	6cm	5.5cm
9cm	9cm	8.5cm
1 Litre	13cm	11cm
2 Litre	17cm	13cm
3 Litre	19cm	15cm
4 Litre	20cm	17cm
5 Litre	23cm	19cm
7 Litre	25cm	20cm

Please note: the pot sizes listed below may vary due to the suppliers we use.

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Out of stock

1 Bulb £0.00 £0.00 each

2 Bulbs £0.00 £0.00 each

3 Bulbs £0.00 £0.00 each

4 Bulbs £0.00 £0.00 each

FREE DELIVERY OVER £30

QUALITY GUARANTEED

Good To Know:

Eventual Height

150cm

Season of Interest

Spring

Allium Gladiator or 'ornamental onion' is a statuesque, herbaceous perennial known for its striking globe shaped flower heads. Each sphere is packed with hundreds of starry, lilac purple florets and blooms from late Spring into early Summer. These impressive flowers attract pollinators, making them a beneficial addition to wildlife-friendly gardens. Growing up to 150 cm in height with flower heads reaching 15-20 cm across, they add dramatic interest and structure to garden displays.

Plant Allium Gladiator bulbs in Autumn or early Winter in fertile, well-drained soil, ideally in full sun. Space them about 20cm apart and bury to a depth around three times the bulb height. Water thoroughly after planting and add mulch or compost to improve soil structure and drainage. Once flowering finishes, remove spent blooms and allow the foliage to die back naturally to support bulb strength for the next season. Hardy in the UK, they’ll return year after year with minimal care.

Perfect for borders, beds, or large patio pots, Allium Gladiator creates height and drama when planted in groups or dotted among other perennials. Pair with ornamental grasses, low growing perennials, or late Spring bulbs for a layered effect. Their bold flowers are also long lasting when cut, making them ideal for indoor floral arrangements.

Light Required

Full sun

Watering

Moderate watering

Best Growing Conditions

Plant Allium Gladiator bulbs in Autumn or early Winter in fertile, well-drained soil, ideally in full sun. Space them about 20cm apart and bury to a depth around three times the bulb height.

Standard Delivery (2-4 working days)

£2.99 on orders under £30
FREE on orders over £30
*Mainland UK only

Next Working Day Delivery

£4.99 on orders under £70
FREE on orders over £70
Order by 1pm Mon-Fri

Northern Ireland & Islands Delivery (2-5 working days)

£4.99 for all orders

Discover more in

ALLIUM

FLOWER BULBS

FULL PRICE (INCL. CHRISTMAS TREES)

SPRING BULBS

Cluster of large purple Allium ‘Gladiator’ flower heads in full bloom against a green garden backdrop.

Allium Gladiator Spring Bulbs

£7.99