Iowa · zones 4b–6a
When to plant cherry tomatoes in Iowa.
Sow or transplant between May 8 to Jul 8 in a typical year, keyed to Iowa's median last frost around May 1. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Cherry Tomatoes dates for a typical Iowa season.
1 · Start indoors
Mar 27 to May 27
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
May 8 to Jul 8
Keyed to the ~May 1 last frost. Sow 0.25" deep, 24" apart.
Harvest
~57 days later
~8 lb per plant over ~10 weeks.
Iowa spans more than one climate: Zone 5 is the most common zone, but the state runs 4b to 6a. That's why the planner works from your ZIP code's frost dates, not your zone: mountain and coastal gardens in the same state can be three weeks apart.
In Iowa: watch for
The pests that find cherry tomatoes here.
A middle-length season, about 159 frost-free days, means tomato, cherry overlaps tomato hornworm for a stretch each summer. Check plants every week or two and treat early.
Big green caterpillars strip leaves and leave black droppings.
Organic fix: Handpick at dusk; spray Bt on the young ones.
Clusters on new growth, sticky leaves, curling tips.
Organic fix: Blast with water, then insecticidal soap or neem.
Dark spots with concentric rings, starting on the lowest, oldest leaves.
Organic fix: Remove affected leaves, mulch to stop soil splash, space for airflow.
Greasy, water-soaked blotches in cool, wet spells. No rings, and not bottom-up.
Organic fix: Pull infected plants fast, keep leaves dry, use neem as a preventive.
Septoria leaf spot
Many small tan spots with dark brown edges, low leaves first, no rings inside.
Organic fix: Strip the lowest leaves, mulch against soil splash, stake for airflow.
Your season math: Iowa gives cherry tomatoes about 159 frost-free days, and it needs roughly 57 days to a first harvest. It's a one-planting crop, so time that single sowing well.
Planting cherry tomatoes in Iowa: questions
When should I plant cherry tomatoes in Iowa?+
In a typical Iowa year, sow cherry tomatoes or set out transplants between May 8 to Jul 8, keyed to the state's median last frost around May 1. Your exact dates shift with your ZIP code and microclimate.
When do I start cherry tomatoes seeds indoors in Iowa?+
Start seeds inside about 6 weeks before set-out: roughly Mar 27 to May 27 for a typical Iowa season.
What USDA zone is Iowa?+
Iowa spans zones 4b–6a, mostly zone 5. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many cherry tomatoes plants do I need?+
Depends who you're feeding. The crop page has exact counts per household size, or the free planner does the math for your family in about 60 seconds.