When to plant tomato in New Haven
Tomato is frost-tender, so every date keys off New Haven's last spring frost of Apr 19.
Step 1 · Sow
Start seeds indoors
Mar 30 – Apr 20
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Jun 2 – Jun 23
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Aug 1 – Aug 26
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 85 d
New Haven's 184-day season leaves this much room.
Tomato on New Haven's growing year
Frost-bounded season with crops mapped onto the 12-month axis.
Frost risk Growing Harvest
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
FROST
FROST
APR 19
OCT 19
Common questions
When will tomato be ready to harvest in New Haven?
Expect to harvest from around early August (Aug 1–Aug 26) in New Haven, based on its local frost dates. Confidence 75%.
When should I start tomato seeds indoors in New Haven?
Start seeds indoors around late March (Mar 30–Apr 20) in New Haven, based on its local frost dates. Confidence 79%.
When can I transplant tomato outdoors in New Haven?
Transplant outdoors around early June (Jun 2–Jun 23) in New Haven, based on its local frost dates. Confidence 81%.
How long is the growing season in New Haven?
New Haven has roughly 184 frost-free days, which is enough time to grow tomato to maturity outdoors.
The rule of thumb
Sow tomato 6–8 weeks before your last spring frost; plant out 2–3 weeks after it. Every date on this page is derived from that rule and New Haven's frost dates.
Confidence 83/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.