When to plant leek in Baltimore
Leek is cold-hardy, so every date keys off Baltimore's frost dates of Mar 21.
Step 1 · Sow
Start seeds indoors
Jan 10 – Jan 31
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 18 – Apr 8
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jun 26 – Jul 16
Picking runs until conditions turn against the crop.
Window
Days to maturity
100 – 120 d
Baltimore's 249-day season leaves this much room.
Leek 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 leek be ready to harvest in Baltimore?
Expect to harvest from around late June (Jun 26–Jul 16) in Baltimore, based on its local frost dates. Confidence 76%.
When should I start leek seeds indoors in Baltimore?
Start seeds indoors around early January (Jan 10–Jan 31) in Baltimore, based on its local frost dates. Confidence 80%.
When can I transplant leek outdoors in Baltimore?
Transplant outdoors around mid March (Mar 18–Apr 8) 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 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 Baltimore's frost dates.
Confidence 84/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.