Komatsuna · Weifang, Shandong, China
When to plant komatsuna in Weifang
Main outdoor window
11 Mar - 8 Apr
The window this page is built around.
Timed from last spring frost
1 April
In Weifang, on your chosen risk.
Ready to pick
1 May - 30 Nov
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 Weifang
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
19 Aug - 9 Sep
Counting back 64 days from your first frost so the crop matures in time.
Sow direct
11 Mar - 8 Apr
Three weeks before your last frost.
Harvest
1 May - 30 Nov
Komatsuna through the year
Against the frost risk in Weifang
Why these dates
Sow from three weeks before the last frost and every two to three weeks thereafter. It tolerates summer sowings better than most of its relatives.
Hardy to around -8C. Unprotected plants keep growing slowly through mild winters rather than merely surviving them.
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. Komatsuna are timed for direct sowing 3 weeks before it, and this page simply resolves those offsets against the frost date computed for Weifang.
The median frost-free season here is 226 days, against 35 to 50 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Weifang
Other vegetables to time
Growing komatsuna in Weifang
When should I plant komatsuna in Weifang?
Aim for 11 Mar - 8 Apr in an average year. If you would rather not gamble on the weather, wait until 21 Mar - 18 Apr - by then frost has finished in nine years out of ten.
When will komatsuna be ready to harvest in Weifang?
Expect to start picking around 1 May - 30 Nov, based on 35 to 50 days to maturity from the planting date calculated for this location.
How much frost will komatsuna tolerate?
Hardy to around -8C. Unprotected plants keep growing slowly through mild winters rather than merely surviving them.