Mung bean · Tongchuanshi, Shaanxi, China
When to plant mung beans in Tongchuanshi
Main outdoor window
9-30 Apr
The window this page is built around.
Timed from last spring frost
26 March
In Tongchuanshi, on your chosen risk.
Ready to pick
23 Jun - 18 Jul
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 Tongchuanshi
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
9-30 Apr
Two weeks after your last frost.
Harvest
23 Jun - 18 Jul
Mung beans through the year
Against the frost risk in Tongchuanshi
Why these dates
Killed by any frost. Needs roughly 90 warm frost-free days to dry a crop down.
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. Mung beans are timed for direct sowing 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Tongchuanshi.
The median frost-free season here is 226 days, against 75 to 100 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Growing mung beans in Tongchuanshi
When should I plant mung beans in Tongchuanshi?
Aim for 9-30 Apr in an average year. If you would rather not gamble on the weather, wait until 27 Apr - 18 May - by then frost has finished in nine years out of ten.
When will mung beans be ready to harvest in Tongchuanshi?
Expect to start picking around 23 Jun - 18 Jul, based on 75 to 100 days to maturity from the planting date calculated for this location.
How much frost will mung beans tolerate?
Killed by any frost. Needs roughly 90 warm frost-free days to dry a crop down.