When to plant sweet potato in Marseille
Sweet potato is frost-tender, so every date keys off Marseille's last spring frost of Mar 15.
Step 1 · Plant
Transplant outdoors
Apr 5 – Apr 26
Once frost risk has passed and nights stay mild.
Step 2 · Harvest
Harvest window
Jul 4 – Aug 3
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
Marseille's 261-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
FROST
MAR 15
DEC 1
Common questions
When will sweet potato be ready to harvest in Marseille?
Expect to harvest from around early July (Jul 4–Aug 3) in Marseille, based on its local frost dates. Confidence 76%.
When can I transplant sweet potato outdoors in Marseille?
Transplant outdoors around early April (Apr 5–Apr 26) in Marseille, based on its local frost dates. Confidence 84%.
How long is the growing season in Marseille?
Marseille has roughly 261 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 84/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.