Allium caeruleum
TAXONOMY
FamilyAmaryllidaceae
GenusAllium
Zone4
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Allium caeruleum, commonly known as Blue Allium or Blue Globe Onion, is a bulbous perennial native to Central Asia. It is known for its striking blue spherical flower heads that bloom in late spring to early summer. The plant goes dormant in the summer after flowering.
ALSO KNOWN AS
Blue Globe Onion
Allium azureum
Allium caerulescens
Allium viviparum
OVERVIEW
VPDCalculate
WaterDry
SoilLoamy
LightDirect Bright (6 Hours)
Temperature20° C
Humidity50%
Dormancy3 Months
pH6.5
Pressure1,013 mbar
DETAILS
Care Instructions
Blue Allium requires bright, direct sunlight and moderate temperatures. It prefers soil that dries out almost completely between waterings. The plant thrives in moderate humidity and should be protected from excessive moisture to prevent bulb rot.Soil
Blue Allium prefers well-draining loamy soil. It is important to ensure good drainage to prevent waterlogging, which can cause bulb rot. A sandy loam mix is ideal for this plant.Fertilizer
Use a balanced fertilizer with a nutrient composition of 5-10-10. Fertilize the plant in early spring before the flowering period. Avoid over-fertilizing as it can lead to excessive foliage growth at the expense of flowers.Repotting
Repot Blue Allium bulbs in the fall after the foliage has died back. Carefully dig up the bulbs, separate any offsets, and replant them in a well-draining soil mix. Ensure the bulbs are planted at a depth of about 2-3 times their height.Propagation
Blue Allium can be propagated by dividing the bulbs in the fall. Separate the offsets from the main bulb and plant them in a well-draining soil mix. Ensure they are planted at the correct depth and water sparingly until established.Pruning
Pruning is not generally required for Blue Allium. However, you can remove spent flower heads to prevent self-seeding and tidy up the plant. Allow the foliage to die back naturally as it provides nutrients to the bulb for the next growing season.Toxicity
Blue Allium is not toxic to pets or humans. However, as with all Allium species, it is best to avoid ingestion of large quantities as it can cause mild gastrointestinal upset.Additional
Blue Allium is a low-maintenance plant that adds a unique splash of color to gardens. It is deer and rodent resistant, making it a great choice for areas where these pests are a problem. Ensure the plant has good air circulation to prevent fungal diseases.REVOLUTIONIZE YOUR PLANT CARE
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