Zone 5 · Flossflower
Planting Flossflower in Zone 5
Ageratum houstonianum
✅ Flossflower thrives in zone 5 (hardy 2–11)
Can I plant today?
✅ Start Flossflower indoors now
You're 4 weeks from last frost. Transplant after last frost. Fluffy clusters hold color all season; deer-resistant.
Evaluated for April 27, 2026 ·
Zone's last frost
around May 15
Zone's first frost
around October 15
Bloom window
June – October
Peak bloom
July
Sun required
full sun, part sun
Mature height
12"
Spacing
9" apart
Type
annual
How to plant Flossflower in zone 5
Transplant after last frost. Fluffy clusters hold color all season; deer-resistant.
💡 In zone 5, start seeds indoors around March — about 6 weeks before your last frost.
Pair with these for continuous bloom
Flossflower peaks in July. These companions keep your bed in color before and after.
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