When to plant cauliflower in Tokyo
Cauliflower is cold-hardy, so every date keys off Tokyo's frost dates of Mar 25.
Step 1 · Sow
Start seeds indoors
Feb 11 – Mar 4
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Mar 11 – Apr 1
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
May 10 – Jun 4
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 85 d
Tokyo's 255-day season leaves this much room.
Cauliflower on Tokyo'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 25
DEC 5
Common questions
When will cauliflower be ready to harvest in Tokyo?
Expect to harvest from around early May (May 10–Jun 4) in Tokyo, based on its local frost dates. Confidence 79%.
When should I start cauliflower seeds indoors in Tokyo?
Start seeds indoors around mid February (Feb 11–Mar 4) in Tokyo, based on its local frost dates. Confidence 84%.
When can I transplant cauliflower outdoors in Tokyo?
Transplant outdoors around mid March (Mar 11–Apr 1) in Tokyo, based on its local frost dates. Confidence 88%.
How long is the growing season in Tokyo?
Tokyo has roughly 255 frost-free days, which is enough time to grow cauliflower to maturity outdoors.
The rule of thumb
Sow cauliflower 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 Tokyo's frost dates.
Confidence 88/100 · NOAA GHCN-Daily · 1991–2020 normals · frost dates are probabilities, not guarantees.