When to plant sweet potato in San Diego
Sweet potato is frost-tender, so every date keys off San Diego's last spring frost.
Step 1 · Sow
Direct sow outdoors
May 11 – Jun 1
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Aug 9 – Sep 8
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 San Diego?
Direct-sow around mid May (May 11–Jun 1) in San Diego, based on its local frost dates. Confidence 81%.
When will sweet potato be ready to harvest in San Diego?
Expect to harvest from around early August (Aug 9–Sep 8) in San Diego, based on its local frost dates. Confidence 76%.
How long is the growing season in San Diego?
San Diego 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 San Diego's frost dates.
Confidence 84/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.