Carrot · Wuwei, Gansu, China
When to plant carrots in Wuwei
Main outdoor window
3-24 Apr
The window this page is built around.
Timed from last spring frost
24 April
In Wuwei, on your chosen risk.
Ready to pick
2-22 Jun
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 Wuwei
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
20 Jun - 11 Jul
Counting back 94 days from your first frost so the crop matures in time.
Sow direct
3-24 Apr
Three weeks before your last frost.
Harvest
2-22 Jun
Carrots through the year
Against the frost risk in Wuwei
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 Wuwei.
The median frost-free season here is 172 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 Wuwei
Other vegetables to time
Growing carrots in Wuwei
When should I plant carrots in Wuwei?
Aim for 3-24 Apr in an average year. If you would rather not gamble on the weather, wait until 21 Apr - 12 May - by then frost has finished in nine years out of ten.
When will carrots be ready to harvest in Wuwei?
Expect to start picking around 2-22 Jun, 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.