When to plant sweet potato in Marseille
Sweet potato is frost-tender, so every date keys off Marseille's last spring frost of Feb 22.
Step 1 · Plant
Transplant outdoors
May 20 – Jun 10
Once frost risk has passed and nights stay mild.
Step 2 · Harvest
Harvest window
Aug 18 – Sep 17
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
Marseille's 284-day season leaves this much room.
Sweet potato on Marseille'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
FEB 22
DEC 3
Common questions
When will sweet potato be ready to harvest in Marseille?
Expect to harvest from around mid August (Aug 18–Sep 17) in Marseille, based on its local frost dates. Confidence 79%.
When can I transplant sweet potato outdoors in Marseille?
Transplant outdoors around mid May (May 20–Jun 10) in Marseille, based on its local frost dates. Confidence 85%.
How long is the growing season in Marseille?
Marseille has roughly 284 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 Marseille's frost dates.
Confidence 88/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.