Zone 4 · Gladiolus
Planting Gladiolus in Zone 4
Gladiolus × hortulanus
✅ Gladiolus thrives in zone 4 (hardy 3–10)
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
July – September
Peak bloom
August
Sun required
full sun
Mature height
48"
Spacing
6" apart
Type
bulb
How to plant Gladiolus in zone 4
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.
Want a full bed designed for zone 4?
Sign up free. GimmeBlooms builds a bloom-succession layout withGladiolus and 3–5 perfect companions.
Design my bed →