Iowa planting calendar

When to plant okra in Iowa — sow, transplant & harvest dates

Iowa is mostly USDA zone 5b (range 4b-6a). Dates below are derived from okra's frost tolerance and Iowa's frost window — not generic national averages.

Okra planting timetable for Iowa

Stage	When in Iowa	Anchor
Start seeds indoors	late March (March 28)	4 weeks before the last frost (late April)
Transplant outside	early May (May 9)	14 days after the last frost (late April)
First harvest (estimate)	early July (July 8)	~60 days from transplant

Dates are state-wide averages for the dominant zone. Local microclimates — elevation, urban heat, coastal moderation — can shift the window by 1-2 weeks. Use the frost-date calculator for a date tuned to your town.

Why Iowa's climate shifts the okra dates

Iowa's last spring frost averages late April and first fall frost early October, which sets the whole planting clock. Iowa has a classic continental prairie climate — cold winters, hot humid summers, and a strong but bounded growing season. Wait for warm soil — okra stall in cold ground even after the air warms, so don't rush them out.

Okra is a heat-loving crop that stalls in cool weather — direct-sow or transplant after the last frost when soil temperature reaches 21 °C (70 °F), or pod set is poor. In zones 6-7, starting seeds 3-4 weeks indoors (in biodegradable pots to avoid tap-root disturbance) extends the season enough to reach full production. Soak seeds 12-24 hours before sowing to improve germination, and nick the hard seed coat if germination is slow.

Frost-risk note

Don't plant before late April — even a light frost will kill seedlings overnight. In the northern counties near Minnesota (zone 4b) the safe date runs a week or two later.

Regional variation within Iowa

the northern counties near Minnesota (zone 4b) runs roughly 1-2 weeks behind the state average; the southeast along the Mississippi (zone 6a) can plant 1-2 weeks earlier.

Des Moines — USDA zone 5b
Cedar Rapids — USDA zone 5a
Davenport — USDA zone 5b
Sioux City — USDA zone 5a

What else to plant in Iowa around then

Pair the post-frost slot with other warm-season crops — peppers, beans, squash, and cucumbers.

Quick-grow guide

Sun: Full sun — 6-8 hours direct.
Soil temperature for germination: 21-35 °C (70-95 °F).
Spacing: 12-18 inches (30-45 cm) between plants.
Days to harvest: ~60 days from planting out.

Frequently asked questions

When is the best time to plant okra in Iowa?

In Iowa (mostly USDA zone 5b), sow okra indoors around late March, transplant outdoors early May (after the last frost, late April), and harvest from early July. Okra are frost-tender — a single light frost kills seedlings, so they only go outside once frost danger has fully passed and the soil is warm.

What USDA zone is Iowa?

Most of Iowa sits in USDA hardiness zone 5b, with the state spanning roughly 4b-6a from the northern counties near Minnesota (zone 4b) to the southeast along the Mississippi (zone 6a). The last spring frost averages late April and the first fall frost early October.

Can you grow okra in Iowa?

Yes. Iowa's dominant zone 5b supports okra — the key is timing. Okra are frost-tender — a single light frost kills seedlings, so they only go outside once frost danger has fully passed and the soil is warm.

Does the planting date change across Iowa?

the northern counties near Minnesota (zone 4b) runs roughly 1-2 weeks behind the state average; the southeast along the Mississippi (zone 6a) can plant 1-2 weeks earlier.

What else can I plant in Iowa around the same time?

Pair the post-frost slot with other warm-season crops — peppers, beans, squash, and cucumbers.

Source and methodology

State zone spans from the USDA Plant Hardiness Zone Map (2023); frost-date averages from NOAA Climate Data Online. Hot-state two-season timing cross-checked against the UF/IFAS Florida Gardening Calendar and the University of Arizona Cooperative Extension planting calendar. Curated by the Growli editorial team.