When to plant garlic in Indianapolis
Garlic is cold-hardy, so every date keys off Indianapolis's frost dates of Apr 17.
Step 1 · Sow
Direct sow outdoors
Sep 16 – Oct 7
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
May 14 – May 14
Picking runs until conditions turn against the crop.
Window
Days to maturity
240 d
Indianapolis's 178-day season leaves this much room.
Garlic on Indianapolis'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
APR 17
OCT 14
Common questions
When can I sow garlic outdoors in Indianapolis?
Direct-sow around mid September (Sep 16–Oct 7) in Indianapolis, based on its local frost dates. Confidence 83%.
When will garlic be ready to harvest in Indianapolis?
Expect to harvest from around mid May (May 14–May 14) in Indianapolis, based on its local frost dates. Confidence 75%.
How long is the growing season in Indianapolis?
Indianapolis has roughly 178 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 Indianapolis's frost dates.
Confidence 83/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.