When to plant radish in Osaka
Radish is cold-hardy, so every date keys off Osaka's frost dates of Mar 22.
Step 1 · Sow
Direct sow outdoors
Feb 22 – Mar 15
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Mar 19 – Mar 24
Picking runs until conditions turn against the crop.
Window
Days to maturity
25 – 30 d
Osaka's 258-day season leaves this much room.
Radish on Osaka'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
MAR 22
DEC 5
Common questions
When can I sow radish outdoors in Osaka?
Direct-sow around late February (Feb 22–Mar 15) in Osaka, based on its local frost dates. Confidence 86%.
When will radish be ready to harvest in Osaka?
Expect to harvest from around mid March (Mar 19–Mar 24) in Osaka, based on its local frost dates. Confidence 77%.
How long is the growing season in Osaka?
Osaka has roughly 258 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 Osaka's frost dates.
Confidence 86/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.