When to plant garlic in St. Louis
Garlic is cold-hardy, so every date keys off St. Louis's frost dates of Mar 30.
Step 1 · Sow
Direct sow outdoors
Oct 8 – Oct 29
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Jun 5 – Jun 5
Picking runs until conditions turn against the crop.
Window
Days to maturity
240 d
St. Louis's 218-day season leaves this much room.
Garlic on St. Louis'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 30
NOV 5
Common questions
When can I sow garlic outdoors in St. Louis?
Direct-sow around early October (Oct 8–Oct 29) in St. Louis, based on its local frost dates. Confidence 84%.
When will garlic be ready to harvest in St. Louis?
Expect to harvest from around early June (Jun 5–Jun 5) in St. Louis, based on its local frost dates. Confidence 76%.
How long is the growing season in St. Louis?
St. Louis has roughly 218 frost-free days, which is marginal time to grow garlic to maturity outdoors.
The rule of thumb
Sow garlic 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 St. Louis's frost dates.
Confidence 84/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.