Zone 4 · Giant Allium
Planting Giant Allium in Zone 4
Allium giganteum
✅ Giant Allium thrives in zone 4 (hardy 3–9)
Can I plant today?
⏳ Too early to direct-sow
Last frost is in 4 weeks. Wait until soil warms.
Evaluated for April 27, 2026 ·
Zone's last frost
around May 15
Zone's first frost
around September 15
Bloom window
May – June
Peak bloom
May
Sun required
full sun
Mature height
36"
Spacing
12" apart
Type
bulb
How to plant Giant Allium in zone 4
Plant bulbs in fall. Globe-shaped purple blooms on tall stems. Deer and rabbit resistant.
Pair with these for continuous bloom
Giant Allium peaks in May. These companions keep your bed in color before and after.
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