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Allium cernuum
Allium cernuum
Allium cernuum
Allium cernuum

Allium cernuum

TAXONOMY

FamilyAmaryllidaceae
GenusAllium
Zone4

ABOUT

Allium cernuum, commonly known as nodding onion, is a perennial plant native to North America. It is part of the Amaryllidaceae family and the Allium genus. The plant is known for its distinctive nodding flower heads and is often found in prairies, open woods, and rocky outcrops. It undergoes a dormancy period during the winter months.

ALSO KNOWN AS

Calliprena Cernua
Cepa Cernua
Gynodon Cernuus
Gynodon Elliotii
Gynodon Rupestris
Nodding Onion
Allium alatum
Allium allegheniense
Allium cernuum f. alba
Allium cernuum f. obtusum
Allium cernuum subsp. neomexicanum
Allium cernuum subsp. obtusum
Allium cernuum var. neomexicanum
Allium cernuum var. obtusum
Allium neomexicanum
Allium nutans
Allium oxyphilum
Allium recurvatum
Allium tricorne

OVERVIEW

WaterMoist
SoilLoamy
LightDirect Bright (6 Hours)
Temperature20° C
Humidity50%
Dormancy3 Months
pH6.5
Pressure1,013 mbar

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DETAILS

Care Instructions
Nodding onion thrives in bright, direct sunlight and prefers moderate temperatures. It requires moderate humidity and should be watered when the soil partially dries out. The plant is relatively easy to care for and can tolerate a range of conditions.
Soil
Allium cernuum prefers well-draining loamy soil. It can tolerate a range of soil types but performs best in soil that retains some moisture without becoming waterlogged. Good drainage is essential to prevent root rot.
Fertilizer
Use a balanced fertilizer with a nutrient composition of 5-10-10. Fertilize the plant during the growing season to promote healthy growth and flowering. Avoid over-fertilizing, as this can lead to excessive foliage growth at the expense of flowers.
Repotting
Repotting is generally not necessary for Allium cernuum, as it is typically grown outdoors. However, if grown in containers, repot the plant every few years to refresh the soil and provide more space for root growth. Repot in early spring before the growing season begins.
Propagation
Allium cernuum can be propagated by seed or by dividing the bulbs. The best time to propagate by division is in the fall after the plant has finished flowering. Carefully dig up the bulbs, separate them, and replant them in a suitable location.
Pruning
Pruning is not required for Allium cernuum. However, you can remove spent flower heads to encourage more blooms and prevent self-seeding. Cut back the foliage after it has died back in the fall.
Toxicity
Allium cernuum is not toxic to pets or humans. However, as with all Allium species, it is best to avoid excessive consumption by pets, as it can cause gastrointestinal upset.
Additional
Nodding onion is a great addition to rock gardens, wildflower meadows, and pollinator gardens. It attracts bees and butterflies, making it beneficial for the local ecosystem. The plant is also deer-resistant, making it a good choice for areas with high deer populations.
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