Allium Gladiator Spring Bulbs

Spring Flowering - UK Hardy Pollinator Friendly

Ornamental Onion

£7.99

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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  • 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.

    Plant genus Allium

    Plant typePerennials

    Foliage typeHerbaceous

    HardinessHardy

    Soil acidityNeutral Soil

    Planting aspectSouth Facing

    Flower colourLilac purple

    Leaf colourGreen

    Growth Rate Moderate

    Standard Delivery (2-4 working days) - Evri

    £4.99 on orders under £40
    FREE on orders over £40
    *Mainland UK only

    Next Working Day Delivery - Evri

    £6.99 on orders under £70
    FREE on orders over £70
    Order by 1pm Mon-Fri

     

    Premium Standard Delivery (2-4 working days) - Royal Mail

    For customers who prefer an alternative carrier, Royal Mail is offered as a premium alternative to our standard Evri service.

    £7.99 on all orders

    Premium Next Working Day Delivery - Royal Mail

    £8.99 on all orders
    *Mainland UK only

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

    £5.99 for all orders

    Top tip

    Plant in full sun for the best display of dramatic blooms.

    Key Features

    Beginner Friendly

    Beginner Friendly

    Comes Back Each Year

    Comes Back Each Year

    Good For Containers

    Good For Containers

    Low Maintenance

    Low Maintenance

    Wildlife Friendly

    Wildlife Friendly

    Season of Interest

    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Planting Flowering Harvest