USDA Zone 5b — Garden & Frost Dates for Des Moines, IA (50301)
This is the local garden report for ZIP code 50301 (Des Moines, IA). It pairs the official USDA 2023 hardiness zone with NOAA-based frost dates so you can plan seeds, transplants, and fall crops with real numbers for your neighborhood.
What does zone 5b mean for Des Moines?
Zone 5b is the USDA Plant Hardiness Zone for ZIP 50301, based on the 30-year (1991-2020) average annual extreme minimum winter temperature. Perennial plants labeled for zone 5b or lower should survive a typical winter here. The last spring frost averages 04-20 and the first fall frost averages 10-12, giving roughly 175 frost-free growing days — the window that most vegetables need to go from seed to harvest.
Start your Des Moines planting calendar
This calendar is pre-loaded with the exact frost dates for ZIP 50301 (Des Moines, IA) — more precise than a state-wide average. Pick a crop and print the plan.
In this ZIP (typical zone 4–5), last frost ≈ Apr 20, first frost ≈ Oct 12 (175-day season), your Tomato plan:
Month-by-month (this ZIP, 2026)
| Month | Action |
|---|---|
| Jan | — |
| Feb | — |
| Mar | Start indoors |
| Apr | — |
| May | Sow · Transplant |
| Jun | — |
| Jul | Harvest |
| Aug | — |
| Sep | — |
| Oct | — |
| Nov | — |
| Dec | — |
Start indoors 6 weeks before last frost; transplant after soil warms. Zones 3–13 suitable. Dates are typical; confirm with your county extension and watch the 10-day forecast.
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