Buckwheat · Phnom Penh, Phnom Penh, Cambodia
When to plant buckwheat in Phnom Penh
Main outdoor window
not outdoors here
The window this page is built around.
Timed from last spring frost
no spring frost
In Phnom Penh, on your chosen risk.
First autumn frost
no autumn frost
The far end of the outdoor season.
The average last frost. Half of all years are later than this.
Step by step in Phnom Penh
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.
Buckwheat through the year
Against the frost risk in Phnom Penh
Why these dates
Sow after the last frost, any time up to about eleven weeks before the first. Because it matures so fast it can follow an early crop and still finish, and it smothers weeds while doing so.
Killed outright by the lightest frost, which is exactly why it works as a summer cover crop that clears itself away in autumn.
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. Buckwheat are timed for direct sowing 1 weeks after it, and this page simply resolves those offsets against the frost date computed for Phnom Penh.
Also in Phnom Penh
Other grains to time
Growing buckwheat in Phnom Penh
How much frost will buckwheat tolerate?
Killed outright by the lightest frost, which is exactly why it works as a summer cover crop that clears itself away in autumn.