Zone 3 · Gladiolus
Planting Gladiolus in Zone 3
Gladiolus × hortulanus
✅ Gladiolus thrives in zone 3 (hardy 3–10)
Can I plant today?
🌸 Gladiolus should be blooming now!
Plants set out in early season are peaking. Deadhead to keep blooms coming.
Evaluated for July 28, 2026 ·
Zone's last frost
around May 15
Zone's first frost
around September 15
Bloom window
July – September
Peak bloom
August
Sun required
full sun
Mature height
48"
Spacing
6" apart
Type
bulb
How to plant Gladiolus in zone 3
Plant corms after last frost, 4 inches deep. Stagger plantings every 2 weeks for continuous bloom. Dig in fall in zones 3-6.
Pair with these for continuous bloom
Gladiolus peaks in August. These companions keep your bed in color before and after.
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