Allium Species, Ornamental Allium, Purple-flowered Onion

Alliumatropurpureum

Family
Amaryllidaceae (am-uh-ril-id-AY-see-ee)
Genus
Allium (AL-ee-um)
Species
atropurpureum (at-ro-pur-PURR-ee-um)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Provides Winter Interest
This plant is resistant to deer
Height
18-24 in. (45-60 cm)
Spacing
9-12 in. (22-30 cm)
Hardiness
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
Danger
N/A
Bloom Color
Medium Purple
Bloom Time
Late Spring/Early Summer
Mid Summer
Other Details
Category
Bulbs
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Grow outdoors year-round in hardiness zone
Can be grown as an annual
Bloom Characteristics
Flowers are good for cutting
Flowers are good for drying and preserving
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
Patent Information
Non-patented
Propagation Methods
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored
Regional

This plant is said to grow outdoors in the following regions:

Saint Charles, Illinois

Fairport, New York

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Gardener's Notes:

0
positive
1
neutral
0
negative
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C
ROSLINDALE, MA | January 2016 | neutral

A perennial bulb producing densely packed dome-shaped (not spherical) umbels of dark purple/maroon flowers 2" across on 20-30" stems in J...Read More

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