When to plant radish in Lyon
Radish is cold-hardy, so every date keys off Lyon's frost dates of Mar 26.
Step 1 · Sow
Direct sow outdoors
Feb 26 – Mar 19
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Mar 23 – Mar 28
Picking runs until conditions turn against the crop.
Step 3 · Second sowing
Autumn / second sowing
Sep 26 – Oct 10
A second window for a fall crop, timed to mature before the first frost.
Step 4 · Second harvest
Autumn crop harvest
Oct 28 – Nov 2
Maturity window for the second sowing.
Window
Days to maturity
25 – 30 d
Lyon's 232-day season leaves this much room.
Radish on Lyon'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
MAR 26
NOV 16
Common questions
When can I sow radish outdoors in Lyon?
Direct-sow around late February (Feb 26–Mar 19) in Lyon, based on its local frost dates. Confidence 87%.
When will radish be ready to harvest in Lyon?
Expect to harvest from around late March (Mar 23–Mar 28) in Lyon, based on its local frost dates. Confidence 78%.
Can I plant radish in autumn in Lyon?
Yes — Lyon supports a second, autumn sowing of radish around late September (Sep 26–Oct 10), timed to mature before the first fall frost.
How long is the growing season in Lyon?
Lyon has roughly 232 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 Lyon's frost dates.
Confidence 87/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.