When to plant sweet potato in Oakland
Sweet potato is frost-tender, so every date keys off Oakland's last spring frost.
Step 1 · Sow
Direct sow outdoors
Jun 20 – Jul 11
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Sep 18 – Oct 18
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 120 d
From sowing to first pick.
Common questions
When can I sow sweet potato outdoors in Oakland?
Direct-sow around mid June (Jun 20–Jul 11) in Oakland, based on its local frost dates. Confidence 79%.
When will sweet potato be ready to harvest in Oakland?
Expect to harvest from around mid September (Sep 18–Oct 18) in Oakland, based on its local frost dates. Confidence 73%.
How long is the growing season in Oakland?
Oakland has roughly 365 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 Oakland's frost dates.
Confidence 81/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.