When to plant sweet potato in Montgomery
Sweet potato is frost-tender, so every date keys off Montgomery's last spring frost of Mar 12.
Step 1 · Plant
Transplant outdoors
Apr 19 – May 10
Once frost risk has passed and nights stay mild.
Step 2 · Harvest
Harvest window
Jul 18 – Aug 17
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
Montgomery's 240-day season leaves this much room.
Sweet potato on Montgomery'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 12
NOV 9
Common questions
When will sweet potato be ready to harvest in Montgomery?
Expect to harvest from around mid July (Jul 18–Aug 17) in Montgomery, based on its local frost dates. Confidence 80%.
When can I transplant sweet potato outdoors in Montgomery?
Transplant outdoors around mid April (Apr 19–May 10) in Montgomery, based on its local frost dates. Confidence 86%.
How long is the growing season in Montgomery?
Montgomery has roughly 240 frost-free days, which is enough time to grow sweet potato to maturity outdoors.
The rule of thumb
Sow sweet potato 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 Montgomery's frost dates.
Confidence 89/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.