When to plant potato in San Bernardino
Potato is cold-hardy, so every date keys off San Bernardino's frost dates of Feb 23.
Step 1 · Sow
Direct sow outdoors
Dec 26 – Jan 16
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Mar 6 – Apr 25
Picking runs until conditions turn against the crop.
Window
Days to maturity
70 – 120 d
San Bernardino's 284-day season leaves this much room.
Potato on San Bernardino'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
HARVEST
FEB 23
DEC 9
Common questions
When can I sow potato outdoors in San Bernardino?
Direct-sow around late December (Dec 26–Jan 16) in San Bernardino, based on its local frost dates. Confidence 76%.
When will potato be ready to harvest in San Bernardino?
Expect to harvest from around early March (Mar 6–Apr 25) in San Bernardino, based on its local frost dates. Confidence 70%.
How long is the growing season in San Bernardino?
San Bernardino has roughly 284 frost-free days, which is enough time to grow potato to maturity outdoors.
The rule of thumb
Sow potato as soon as the soil is workable — it tolerates cool weather and light frost. Every date on this page is derived from that rule and San Bernardino's frost dates.
Confidence 78/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.