Carrot · Minato City, Tokyo, Japan
When to plant carrots in Minato City
Main outdoor window
15 Feb - 8 Mar
The window this page is built around.
Timed from last spring frost
8 March
In Minato City, on your chosen risk.
Ready to pick
16 Apr - 6 May
If you plant at the start of the window.
The average last frost. Half of all years are later than this.
Step by step in Minato City
Each window is a range, not a single day. Earlier in the range buys you a longer season; later in it buys you a safer one.
Sow for overwintering
30 Aug - 20 Sep
Counting back 94 days from your first frost so the crop matures in time.
Sow direct
15 Feb - 8 Mar
Three weeks before your last frost.
Harvest
16 Apr - 6 May
Carrots through the year
Against the frost risk in Minato City
Why these dates
Sow from three weeks before last frost. Keep the seedbed continuously damp for the two to three weeks germination takes - this single detail decides most carrot crops.
Seedlings tolerate -6C. Mature roots can be left in the ground under mulch and lifted through winter in all but the coldest zones.
Seed packets and extension guides express timing as weeks either side of the last spring frost, because that is the only reference point that travels. Carrots are timed for direct sowing 3 weeks before it, and this page simply resolves those offsets against the frost date computed for Minato City.
The median frost-free season here is 291 days, against 60 to 80 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Minato City
Other vegetables to time
Growing carrots in Minato City
When should I plant carrots in Minato City?
Aim for 15 Feb - 8 Mar in an average year. If you would rather not gamble on the weather, wait until 6-27 Mar - by then frost has finished in nine years out of ten.
When will carrots be ready to harvest in Minato City?
Expect to start picking around 16 Apr - 6 May, based on 60 to 80 days to maturity from the planting date calculated for this location.
How much frost will carrots tolerate?
Seedlings tolerate -6C. Mature roots can be left in the ground under mulch and lifted through winter in all but the coldest zones.