When to plant tomato in Baltimore
Tomato is frost-tender, so every date keys off Baltimore's last spring frost of Mar 21.
Step 1 · Sow
Start seeds indoors
Feb 17 – Mar 10
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Apr 30 – May 21
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 29 – Jul 24
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 85 d
Baltimore's 249-day season leaves this much room.
Tomato on Baltimore'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
MAR 21
NOV 27
Common questions
When will tomato be ready to harvest in Baltimore?
Expect to harvest from around late June (Jun 29–Jul 24) in Baltimore, based on its local frost dates. Confidence 76%.
When should I start tomato seeds indoors in Baltimore?
Start seeds indoors around mid February (Feb 17–Mar 10) in Baltimore, based on its local frost dates. Confidence 80%.
When can I transplant tomato outdoors in Baltimore?
Transplant outdoors around late April (Apr 30–May 21) in Baltimore, based on its local frost dates. Confidence 81%.
How long is the growing season in Baltimore?
Baltimore has roughly 249 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 Baltimore's frost dates.
Confidence 84/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.