Dahlia
flower
Plant tubers after last frost, 4–6 inches deep. Pinch growing tips for bushier plants. In zones 3–7, dig tubers after first frost and store in a cool, dry place over winter.
At a glance
- USDA Zones
- 3–11
- Sun
- Full sun (6+ hrs)
- Water
- Medium — water when top inch of soil is dry
- Soil
- Loam
- pH
- Neutral
- Spacing
- 24 in. between plants
- Space needed
- A 2×2 ft block of the bed
- Days to maturity
- About 90 days
Planting & harvest windows
Northern Hemisphere timing. Adjust ±4–6 weeks based on your last/first frost dates.
| Activity | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Plant | ||||||||||||
| Harvest |
Plant Harvest
Good companions
Recommended varieties
- Dinner Plate90 daysstart
Giant blooms up to 10-plus inches — showstopping focal point.
- Bishop of Llandaff90 daysstart
Classic deep red blooms with stunning bronze-black foliage.
- Gallery Series80 daysstart
Compact dwarf type perfect for raised beds — no staking needed.
- Pompom85 daysstart
Perfectly round ball-shaped blooms in pastel shades.
Add Dahlia to your raised bed — the planner handles spacing and companion warnings automatically.
Open the planner →