When to plant tomato in Phoenix
Tomato is frost-tender, so every date keys off Phoenix's last spring frost of Jan 27.
Step 1 · Sow
Start seeds indoors
Dec 30 – Jan 20
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 14 – Apr 4
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 13 – Jun 7
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 85 d
Phoenix's 314-day season leaves this much room.
Tomato on Phoenix'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
JAN 27
DEC 7
Common questions
When will tomato be ready to harvest in Phoenix?
Expect to harvest from around mid May (May 13–Jun 7) in Phoenix, based on its local frost dates. Confidence 74%.
When should I start tomato seeds indoors in Phoenix?
Start seeds indoors around late December (Dec 30–Jan 20) in Phoenix, based on its local frost dates. Confidence 78%.
When can I transplant tomato outdoors in Phoenix?
Transplant outdoors around mid March (Mar 14–Apr 4) in Phoenix, based on its local frost dates. Confidence 80%.
How long is the growing season in Phoenix?
Phoenix has roughly 314 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 Phoenix's frost dates.
Confidence 82/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.