Annual umbellifer with feathery blue-green foliage and flat-topped yellow flower umbels. A classic culinary herb and a top companion plant for biological pest control.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 2–11 | −45.6 °C to 10 °C | Zones where it can be grown as an annual — not a frost-tolerance rating |
| RHS hardiness rating | H4 | −10 °C to −5 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 2–9 | −40 °C and warmer | Zones where it can be grown as an annual — not a frost-tolerance rating |
| Australian (ANBG) zone | Zone 1–7 | −15 °C and warmer | Zones where it can be grown as an annual — not a frost-tolerance rating |
As a tender annual, Dill doesn't overwinter — the zone range shows where the growing season supports it. See the RHS rating for its actual cold tolerance.
Growing notes
- Larval food plant for swallowtail butterfly caterpillars
- Umbel flowers attract parasitic wasps that control cabbage white caterpillars and aphids — excellent companion near brassicas
- Bolts to flower quickly in hot weather — a useful trait in this case, since flowering is what attracts the beneficial insects
- Both leaves and seeds are culinary
Categories
Related plants
Cross-check Dill against your zones