When to plant leek in Phoenix
Leek is cold-hardy, so every date keys off Phoenix's frost dates of Jan 27.
Step 1 · Sow
Start seeds indoors
Nov 18 – Dec 9
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Dec 27 – Jan 17
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Apr 6 – Apr 26
Picking runs until conditions turn against the crop.
Window
Days to maturity
100 – 120 d
Phoenix's 314-day season leaves this much room.
Leek 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 leek be ready to harvest in Phoenix?
Expect to harvest from around early April (Apr 6–Apr 26) in Phoenix, based on its local frost dates. Confidence 74%.
When should I start leek seeds indoors in Phoenix?
Start seeds indoors around mid November (Nov 18–Dec 9) in Phoenix, based on its local frost dates. Confidence 78%.
When can I transplant leek outdoors in Phoenix?
Transplant outdoors around late December (Dec 27–Jan 17) 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 leek to maturity outdoors.
The rule of thumb
Sow leek as soon as the soil is workable — it tolerates cool weather and light frost. 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.