Blue Allium caeruleum

True Blue Summer Alliums! Bee-Favourite Globes For Sunny Borders And Perennial Planting
Blue Allium caeruleum
30 x Bulbs   |   SKU: 600574
Just £9.99
Club Member Price: £8.49
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Pre Order
Late August

Key Features

  • Dense rounded blue globes, erupting in your summer garden! A rare and striking colour for early borders
  • This RHS recommended 'Plant for Pollinators' helps attract bees and beneficial insects to your garden during the June flowering season
  • Tall stems reach up to 80cm, bringing airy height above neighbouring plants and sunny border schemes
  • Fully hardy bulbs thrive in full sun and pair beautifully with sea holly, salvias, grasses and summer perennials
  • Supplied as 30 bulbs, size 5+, ready to plant out
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Description

Bring One Of Gardening's Most Sought-After Colours Into Your Summer Borders With True Blue Allium Globes - And Pollinators Will Certainly Thank You For It...

Allium caeruleum, also known as Allium azureum, sends up compact rounded flowerheads made up of small, star-shaped bright blue blooms. True blue can be surprisingly hard to find in garden planting, which makes this ornamental onion a brilliant choice for adding cool, vivid colour in early summer.

Flowering in June, the upright stems rise to around 80cm, giving your sunny borders a light accent without creating a heavy block of colour. The narrow leaves often begin to fade before the flowers open, so these bulbs look best woven among medium-height perennials that hide the lower foliage while letting the blue flower globes shine above.

Fully hardy and easy to grow in full sun and well-drained soil, these Blue Allium work beautifully with sea holly, salvias, ornamental grasses, hardy geraniums and other summer border plants. It is also RHS recommended as a 'Plant for Pollinators', drawing bees and butterflies to your displays.

Supplied as 30 size 5+ bulbs, ready to plant.

Top Tips
Underplant with hostas, ferns or other low-growing, hardy perennial plants to help disguise the leaves as they fade.
Care Information

Planting Advice for Alliums:

  • Find a location where the soil drains well and where they will receive full sun.
  • Plant allium bulbs in early to mid-autumn in a sheltered site to prevent the top-heavy flower spikes from getting blown over.
  • Dig over the soil and remove any weeds before planting.
  • Water well after planting, saturating the soil around the bulbs. Once established, alliums are drought tolerant.
  • In borders, plant bulbs in early autumn at a depth of about four times the diameter of the bulbs.
  • In containers, alliums will do well in deep pots with a good general-purpose potting compost with a handful of horticultural grit added. 

Aftercare Advice for Alliums:

  • After planting, feed with a general-purpose feed such as our Blooming Fast Superior Soluble Fertiliser.
  • Dried flower heads can be removed and made into indoor decorations or left on the plants to self-seed.
  • Divide alliums every three to four years or when the plants begin to look overcrowded and blooming decreases.
  • Lift the bulbs with a garden fork or spade and pull the bulbs apart.
  • Replant some in the original location and plant the remainder in a new location. 

Pruning and Trimming Advice for Alliums:

  • The leaves die down at flowering time, so it’s best to plant alliums where this foliage is masked by that of other plants.
  • Avoid removing them while still green, as they provide the bulbs with energy for the following season.
Delivery Information

Please allow us 3-5 working days to dispatch your order. Pre-ordered items will be sent as soon as possible after the date quoted and we'll generally ship your entire order with your pre-ordered items. When your order is dispatched, we'll send you another email with details of how to track it.

Most orders are sent on a fully-tracked courier service with Yodel. To avoid perishable items being stuck at depots and deteriorating, no signature is required, and our courier is asked to leave your order in a safe place on your property.

We'll send a tracking link when we dispatch your order, so you know when its due to arrive. Please note, once delivered we cannot be held responsible for loss or theft from your property. If you have any specific delivery instructions, please let us know - there's an option to enter a short message for the courier at the checkout.

Smaller, lighter, single-item orders may be sent through the post with Royal Mail - in which case no tracking is available.

Our experienced nursery team will always send your plants nursery fresh in the perfect condition to thrive when you plant them, so although most plants are very tough and will not be affected by all but the most extreme frosts or heatwaves, we avoid dispatching the most perishable plants if extreme weather is forecast, or over Bank Holiday weekends.

Please note, we cannot guarantee delivery on a certain day or time. Delivery to outlying postcode areas may take 1-2 days longer, dependent on your location.

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DOUBLE GUARANTEE TO YOU:
1. If you're not totally happy with your order, return it within 30 days and we'll replace or refund in full!
2. Should any hardy plant fail to thrive thereafter, we'll replace free of charge - you just pay the P&P
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Size Guide
X
Pro Plug
Small Plugs

Size:
Height 4-6cm

Ease:
Easy

Grow On?:
Yes

Pro+ Plug
Medium Plugs

Size:
Height 5-7cm

Ease:
Easy

Grow On?:
Yes

Plugs
Plugs

Size:
Height 8-12cm

Ease:
Easy

Grow On?:
Yes

Jumbo Plugs
Plugs

Size:
Height 10-20cm

Ease:
Easy

Grow On?:
Yes

Garden Ready
Garden Ready

Size:
Height 14-20cm

Ease:
Easiest

Grow On?:
Not Necessary