When to plant sweet potato in Lyon
Sweet potato is frost-tender, so every date keys off Lyon's last spring frost of Mar 26.
Step 1 · Plant
Transplant outdoors
Jun 4 – Jun 25
Once frost risk has passed and nights stay mild.
Step 2 · Harvest
Harvest window
Sep 2 – Oct 2
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
Lyon's 232-day season leaves this much room.
Sweet potato on Lyon'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 26
NOV 16
Common questions
When will sweet potato be ready to harvest in Lyon?
Expect to harvest from around early September (Sep 2–Oct 2) in Lyon, based on its local frost dates. Confidence 78%.
When can I transplant sweet potato outdoors in Lyon?
Transplant outdoors around early June (Jun 4–Jun 25) in Lyon, based on its local frost dates. Confidence 84%.
How long is the growing season in Lyon?
Lyon has roughly 232 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 Lyon's frost dates.
Confidence 87/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.