When to plant pepper (sweet & chili) in St. Louis
Pepper (sweet & chili) is frost-tender, so every date keys off St. Louis's last spring frost of Mar 30.
Step 1 · Sow
Start seeds indoors
Feb 13 – Mar 6
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
May 16 – Jun 6
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Jul 20 – Aug 14
Picking runs until conditions turn against the crop.
Window
Days to maturity
65 – 90 d
St. Louis's 218-day season leaves this much room.
Pepper (sweet & chili) 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 will pepper (sweet & chili) be ready to harvest in St. Louis?
Expect to harvest from around mid July (Jul 20–Aug 14) in St. Louis, based on its local frost dates. Confidence 76%.
When should I start pepper (sweet & chili) seeds indoors in St. Louis?
Start seeds indoors around mid February (Feb 13–Mar 6) in St. Louis, based on its local frost dates. Confidence 80%.
When can I transplant pepper (sweet & chili) outdoors in St. Louis?
Transplant outdoors around mid May (May 16–Jun 6) in St. Louis, based on its local frost dates. Confidence 81%.
How long is the growing season in St. Louis?
St. Louis has roughly 218 frost-free days, which is enough time to grow pepper (sweet & chili) to maturity outdoors.
The rule of thumb
Sow pepper (sweet & chili) 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 St. Louis's frost dates.
Confidence 84/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.