Spring wheat · Mianyang, Sichuan, China
When to plant spring wheat in Mianyang
Main outdoor window
4-25 Feb
The window this page is built around.
Timed from last spring frost
25 February
In Mianyang, on your chosen risk.
Ready to pick
15 May - 14 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 Mianyang
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 direct
4-25 Feb
Three weeks before your last frost.
Harvest
15 May - 14 Jun
Spring wheat through the year
Against the frost risk in Mianyang
Why these dates
Sow as early as the ground can be worked, roughly three weeks before the last frost. The seedlings tolerate frost easily; what they cannot tolerate is heat during grain fill, so an early sowing is a hedge against a hot midsummer.
Seedlings survive to about -6C. The vulnerable stage is flowering, where a frost causes blank heads that look normal until threshing.
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. Spring wheat are timed for direct sowing 3 weeks before it, and this page simply resolves those offsets against the frost date computed for Mianyang.
The median frost-free season here is 286 days, against 100 to 130 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Growing spring wheat in Mianyang
When should I plant spring wheat in Mianyang?
Aim for 4-25 Feb in an average year. If you would rather not gamble on the weather, wait until 21 Feb - 14 Mar - by then frost has finished in nine years out of ten.
When will spring wheat be ready to harvest in Mianyang?
Expect to start picking around 15 May - 14 Jun, based on 100 to 130 days to maturity from the planting date calculated for this location.
How much frost will spring wheat tolerate?
Seedlings survive to about -6C. The vulnerable stage is flowering, where a frost causes blank heads that look normal until threshing.