Growing dill in zone 4a
(Zone 4a = an average winter low of -30°F to -25°F.)
In USDA zone 4a, the typical last spring frost is May 12 and the first fall frost is September 28. Here is when to plant dill against those dates.
Typical timing
Zone 4a planting schedule
Evidence trail
How these dates are built
Sprout applies the cited planting offsets to the typical zone 4a frost anchors. The result is a planning baseline for the zone, not a local weather forecast.
- USDA Plant Hardiness Zone Map, 2023USDA Agricultural Research Service / Oregon State University PRISM Group. Supports the USDA hardiness-zone band.
- U.S. Climate Normals 1991-2020NOAA National Centers for Environmental Information. Supports the median spring and fall freeze dates.
- Growing dill in home gardensUniversity of Minnesota Extension. Supports direct-sowing timing (normalized).
Method note
Direct-sow after frost (dill does not transplant easily), 10-12 inch in-row spacing with rows two feet apart, one-fourth inch seed depth, and full-sun hours from this page. UMN gives no pH or water-per-week figure, so those are omitted.
These are zone 4a averages
Computed from 795 ZIP codes in zone 4a. Your town's frost dates vary; enter your ZIP for dates built on your nearest weather station.
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The plant profile covers spacing, light, water, soil, and source-backed timing details. The growing guide covers preparation, care, and harvest technique.