blissgarden.

When to plant sunflower in Connecticut

Connecticut spans USDA zones 6a–7a, so the right time to plant sunflower shifts by weeks across the state. The window to sow seed directly outdoors runs from about April 5 in Bridgeport to May 8 in Torrington — below are local dates for 35 cities, each computed from its own frost dates.

In Bridgeportthe sunflower direct sow window (April 5–April 26) has passed for this year.
CityZoneLast frostFirst frostDirect sow
Bridgeport7aApril 5November 6April 5 – April 26
Stamford7aApril 17October 23April 17 – May 8
New Haven7aApril 17October 27April 17 – May 8
Hartford6bApril 17October 26April 17 – May 8
Waterbury6bApril 26October 16April 26 – May 17
Norwalk7aApril 17October 23April 17 – May 8
Danbury6bMay 1October 14May 1 – May 22
New Britain6bApril 17October 26April 17 – May 8

Sunflower in Connecticut: FAQ

When can I plant sunflower in Connecticut?

Across Connecticut, the time to direct-sow sunflower spans roughly April 5 in Bridgeport to May 8 in Torrington, each following that city's local frost dates.

Does the sunflower planting date vary across Connecticut?

Yes. Connecticut publishes 35 cities with their own frost dates, so the right sunflower 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 sunflower take to grow in Connecticut?

Sunflower takes about 70–100 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.

Planting reminders

Never miss a window in your area

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.

Sunflower planting guide →All Connecticut cities →Connecticut planting calendar →
When to Plant Sunflower in Connecticut — Frost-Based Dates by City — BlissGarden