Rhode Island · zones 6b–7a
When to plant potatoes in Rhode Island.
Sow between Mar 3 to Apr 5 in a typical year, keyed to Rhode Island's median last frost around Apr 10. A second, fall sowing fits Jul 9 to Jul 22. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Potatoes dates for a typical Rhode Island season.
Direct sow
Mar 3 to Apr 5
Keyed to the ~Apr 10 last frost. Sow 4" deep, 12" apart.
Fall round
Jul 9 to Jul 22
Counted back from the ~Oct 27 first frost.
Harvest
~90 days later
~3 lb per plant over ~1 weeks.
Rhode Island spans more than one climate: Zone 6 is the most common zone, but the state runs 6b to 7a. 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 Rhode Island: watch for
The pests that find potatoes here.
A middle-length season, about 200 frost-free days, means potato overlaps colorado potato beetle for a stretch each summer. Check plants every week or two and treat early.
Striped beetles and orange grubs eating the leaves.
Organic fix: Handpick adults, crush the orange egg clusters, dust with diatomaceous earth.
Dark greasy blotches after cool, wet spells.
Organic fix: Pull infected plants fast, keep leaves dry, use neem as a preventive.
Common scab
Rough, corky patches on the skin, raised on some tubers and sunk into pits on others.
Organic fix: Keep the bed evenly moist through the weeks right after tubers set, rotate away from potatoes, and pick a scab-resistant variety next time.
Your season math: Rhode Island gives potatoes about 200 frost-free days, and it needs roughly 90 days to a first harvest. It's a one-planting crop, so time that single sowing well.
Planting potatoes in Rhode Island: questions
When should I plant potatoes in Rhode Island?+
In a typical Rhode Island year, sow potatoes between Mar 3 to Apr 5, keyed to the state's median last frost around Apr 10. There's also a fall window: Jul 9 to Jul 22. Your exact dates shift with your ZIP code and microclimate.
What USDA zone is Rhode Island?+
Rhode Island spans zones 6b–7a, mostly zone 6. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many potatoes 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.