Also known as Darkred Onion
Allium atrorubens, the Dark Red Onion, is a striking ornamental onion native to California, featuring deep red to purple-pink flower clusters atop sturdy stems, adding vi
At-a-glance light, water, soil, and growing conditions from plant data
Full sun
100% intensity
Prefers at least six hours of direct sunlight daily for optimal growth and flowering.
Moderate
50% intensity
Water regularly, allowing soil to dry slightly between waterings. Reduce as foliage yellows.
Well-drained
50% intensity
Moderate
50% intensity
Thrives in moderate temperatures during the growing season and requires a cool period for dormancy.
Low
25% intensity
Light feeding during the growing season is sufficient. Avoid over-fertilization.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | Yes |
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Keep the soil consistently moist, especially during the growing season. Allow the top 2-3 cm of soil to dry out slightly between waterings.
Reduce watering significantly as the foliage begins to yellow and die back, indicating dormancy. Ensure good drainage to prevent waterlogged roots.
Remove spent flower stalks after blooming to prevent seed formation and encourage further flowering or bulb development. Trim away any dead or yellowing foliage in late summer or early autumn.
No significant pruning is typically required for this species.
Primarily propagated by division of bulbs in autumn or early spring when dormant. Carefully separate offsets from the mother bulb and replant them immediately.
Seeds can be sown in autumn or early spring, but flowering may take several years.
Bulbs generally do not require frequent repotting. If overcrowding occurs or the bulbs are visibly outgrowing their container, repot them in autumn after the foliage has died back.
Use a well-draining potting mix and a pot that allows for adequate bulb expansion.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Dark Red Onion (Allium atrorubens)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Liliopsida |
| Order | Asparagales |
| Family | Amaryllidaceae |
| Genus | Allium |
| Species | Allium atrorubens |
Similar in genus Allium
Answers based on plant encyclopedia data
