Ornamental Onion Allium sphaerocephalon
Other Common Name(s):
Other plants called Ornamental Onion:
- Phonetic Spelling
- AL-ee-um sfay-roh-SEF-ah-lon
- This plant has low severity poison characteristics.
- See below
Allium sphaerocephalon flowers in early summer (June-July) and lasts 3-4 weeks. The plant is 30-40 inches tall with a small, densely packed umbel. It reproduces by annual daughter bulb replacement and underground bulblets and requires a warm (68 to 73 degrees F) to cool (28 to 35 degrees F) to warm (55 to 65 degrees F) annual replacement cycle. Allium sphaerocephalon tolerates summer drought, but keep it moist during growing season. The plant is normally not susceptible to animals. Allium sphaerocephalon is a bulbous herb with characteristic onion or garlic odor.
Found in: Forest and natural areas, as native herbaceous plants; landscape as cultivated perennial; weedy in disturbed areas
Light: Full sunlight to PM only sunlight
Space: 2-3 in. apart, 20-25 per sq. ft.
Depth: 5 in. to base of the bulb
Usage: Beds, borders, fresh and dried cut flowers
Organ: Tunicated bulb
Hardiness: Hardy II- Injured at temperatures below 14 degrees F (-10 degrees C) when planted
- See this plant in the following landscape:
- Cultivars / Varieties:
- Cultivars / Varieties:
- Country Or Region Of Origin:
- Europe, North Africa
- Particularly Resistant To (Insects/Diseases/Other Problems):
- normally not susceptible to animals, drought
- EDIBLE PARTS: Leaves, bulbs, and bulblets. Field garlic (A. vineale) is too strong for most tastes. HARVEST TIME: Only collect plants from areas you know have NOT been treated with pesticides. Gather leaves during spring and fall. Gather bulbs in the second year when they are large enough to use like cultivated onions. Flower stem bulblets are collected during the summer. SAFE HANDLING PROCEDURES: Wash leaves, bulbs and bulblets in warm water to remove dirt and debris. Do not use dish detergent or any type of sanitizer. These products can leave a residue. Use as domestic onions, for seasoning, or raw in salads. Bulbs can be used raw, boiled, pickled, or for seasoning. Their strong taste can be reduced by parboiling and discarding the water. To freeze onions or garlic, one should coarsely chop, blanch two minutes, drain, pat dry, and place them into plastic bags. The bulbs can also be dried for use as seasoning. Use flower bulbs to flavor soup or for pickling.
Whole Plant Traits:
- Plant Type:
- Full sun (6 or more hours of direct sunlight a day)
- Flower Color:
- Flower Inflorescence:
- Flower Value To Gardener:
- Good Cut
- Good Dried
- Flower Bloom Time:
- Flower Description:
- Flowers are reddish purple. Flowering period is from very late spring to early summer. Flowers are small, 6-parted, and in a cluster at the top of a naked stem. The plant is 30-40 inches tall with a small, densely packed umbel. The plant smells of garlic or onion. Allium sphaerocephalon blooms in early summer (June-July) and lasts 3-4 weeks.
- Leaf Value To Gardener:
- Hairs Present:
- Leaf Description:
- Leaves are long, slender, flat or cylindrical and hollow. The plant smells of garlic or onion.
- Stem Is Aromatic:
- Landscape Theme:
- Drought Tolerant Garden
- Design Feature:
- Resistance To Challenges:
- Poisonous to Humans
Poisonous to Humans:
- Poison Severity:
- Poison Symptoms:
- CAUSES ONLY LOW TOXICITY IF EATEN. Poisonous if ingested. Symptoms may include nausea, vomiting, and diarrhea. (Poison parts: All parts; bulbs, bulblets, flowers, and stems).
- Poison Toxic Principle:
- Causes Contact Dermatitis:
- Poison Part: