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When to plant onion in Rhode Island

Rhode Island spans USDA zones 6b–7a, so the right time to plant onion shifts by weeks across the state. The window to transplant seedlings outdoors runs from about March 10 in Newport to March 25 in Pawtucket — below are local dates for 11 cities, each computed from its own frost dates.

In Providencethe onion transplant out window (March 14–March 28) has passed for this year.
CityZoneLast frostFirst frostTransplant out
Providence7aApril 11October 30March 14 – March 28
Cranston7aApril 11October 30March 14 – March 28
Warwick7aApril 11October 30March 14 – March 28
Pawtucket7aApril 22October 19March 25 – April 8
East Providence7aApril 11October 30March 14 – March 28
Woonsocket6bApril 22October 19March 25 – April 8
Newport7aApril 7November 13March 10 – March 24
Central Falls7aApril 22October 19March 25 – April 8

Onion in Rhode Island: FAQ

When can I plant onion in Rhode Island?

Across Rhode Island, the time to transplant onion spans roughly March 10 in Newport to March 25 in Pawtucket, each following that city's local frost dates.

Does the onion planting date vary across Rhode Island?

Yes. Rhode Island publishes 11 cities with their own frost dates, so the right onion planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.

How long does onion take to grow in Rhode Island?

Onion takes about 90–110 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.

Planting reminders

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An email when it’s time to start seeds, transplant, and sow — timed to your frost dates. Double opt-in, one-click unsubscribe, no spam.

Onion planting guide →All Rhode Island cities →Rhode Island planting calendar →
When to Plant Onion in Rhode Island — Frost-Based Dates by City — BlissGarden