25x Blue Globe Onion blue - Bulb

Allium caeruleum 
25x Blue Globe Onion blue

Bright blue bulb

Its nickname ‘blue-flowered garlic’ did not just drop from the sky.  This Allium caeruleum is known for its particularly bright blue colour. The globular ornamental onion thrives best in groups in the border. But they also make a lasting impression on the patio or balcony.

It is best to plant the Allium in your garden in autumn. The flower blossoms between April and June. In addition, the Allium will naturalise quite well year after year.
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5-12 Working Days
£ 3.49
£ 6.99  

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Flowering Period

Planting and flowering details
  • Planting
  • What do I need?
    • Small spade or bulb planter
    • Watering can
    • Fresh potting soil and hydro grains (for pots or planters)

    How do I plant the Allium?
    It’s best to plant the Allium as soon as possible after receipt. Plant it directly into the ground, in a flower pot or in a spacious planter. The Allium grows best in loose, well-drained soil. A sheltered spot in the sun, semi-shade or in the shadow will do just fine.
    The Allium should be planted at a depth of 3 times the height of the bulb. For instance, if the flower bulb is 5 cm high it should be planted at a depth of 15 cm. The distance between small bulbs is 5 - 8 cm and 10 - 15 cm between larger ones.

    Planting can be done in spring as well as in autumn. Use a small spade or a special bulb planter for planting. Plant the bulb with the tip up and the roots down.

    Planting the Allium in the garden
    Find a suitable place in the border or create a flowerbed. Loosen the soil well and divide the flower bulbs across the surface. That can be done in groups of 6 or spread out evenly. Plant the Allium as indicated above, water immediately, and don't walk on the freshly planted area.

    How do I plant the Allium in a pot or planter?
    Put a layer of hydro grains on the bottom of a decorative pot. Place the flower bulb in the potting soil at the right depth. Water immediately after planting. It's best to put the pot inside in winter, as a tulip in a pot doesn't cope well with frost. 
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  • Care
  • What do I need?
    • Watering can

    How do I care for the Allium?
    The Allium doesn't require a lot of care. Water well during dry spells. Make sure the soil doesn't become too moist. Remove dead flower stems so all the energy goes to the bulb. Clip off the Allium's leaves once they turn yellow. Cover the soil with a layer of leaves during frost. 
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  • Specifics
  • The ball-shaped flowers of the caeruleum are approximately 4 cm in diameter. The beautiful pure blue of the flowers is an unusual shade that is rarely seen among flowers. It is an early summer flowerer starting from the beginning of May and continuing through to July. Due to its long stalks it makes a very striking cut flower for a vase in the home.
    Even after flowering, alliums still look decorative. The special feature of the larger ornamental onion is the length of time it lasts as a cut flower. Pick your alliums for the vase just as the buds are beginning to open and they will last for ages. When flowering is over, you can dry the flower stalks - just leave them to hang upside down in a well ventilated area.
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  • Extra information
  • Latin name Allium caeruleum 
    Delivery type Supplied as bulb or tuber
    Guarantee 100% growth and flowering guarantee
    Color Blue
    Light preference full sun ,  partial sun
    Scented not scented
    Flowers for cutting yes
    Flowering period May - June
    Growing height40 - 50 cm
    Planting distance10 - 12 cm
    Planting depth5 - 8 cm
    Circumference bulb4 - 5 cm
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