Zone 8 · Dahlia
Planting Dahlia in Zone 8
Dahlia hybrida
✅ Dahlia thrives in zone 8 (hardy 3–11)
Can I plant today?
✅ Safe to plant Dahlia outside
Last frost has passed. Plant tubers after last frost. In zones 3–7, dig tubers in fall after first frost and store indoors in peat moss.
Evaluated for April 27, 2026 ·
Zone's last frost
around March 15
Zone's first frost
around November 15
Bloom window
July – October
Peak bloom
August
Sun required
full sun
Mature height
36"
Spacing
24" apart
Type
bulb
How to plant Dahlia in zone 8
Plant tubers after last frost. In zones 3–7, dig tubers in fall after first frost and store indoors in peat moss.
Pair with these for continuous bloom
Dahlia peaks in August. These companions keep your bed in color before and after.
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