When to plant radish in San Antonio
Radish is cold-hardy, so every date keys off San Antonio's frost dates of Feb 21.
Step 1 · Sow
Direct sow outdoors
Jan 24 – Feb 14
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Feb 18 – Feb 23
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Oct 9 – Oct 23
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Nov 10 – Nov 15
Maturity window for the second sowing.
Window
Days to maturity
25 – 30 d
San Antonio's 282-day season leaves this much room.
Radish on San Antonio'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
FEB 21
NOV 29
Common questions
When can I sow radish outdoors in San Antonio?
Direct-sow around late January (Jan 24–Feb 14) in San Antonio, based on its local frost dates. Confidence 83%.
When will radish be ready to harvest in San Antonio?
Expect to harvest from around mid February (Feb 18–Feb 23) in San Antonio, based on its local frost dates. Confidence 75%.
Can I plant radish in autumn in San Antonio?
Yes — San Antonio supports a second, autumn sowing of radish around early October (Oct 9–Oct 23), timed to mature before the first fall frost.
How long is the growing season in San Antonio?
San Antonio has roughly 282 frost-free days, which is enough time to grow radish to maturity outdoors.
The rule of thumb
Sow radish 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 Antonio's frost dates.
Confidence 83/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.