Mung bean · Changzheng, Shanghai, China
When to plant mung beans in Changzheng
Main outdoor window
16 Mar - 6 Apr
The window this page is built around.
Timed from last spring frost
2 March
In Changzheng, on your chosen risk.
Ready to pick
30 May - 24 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 Changzheng
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
16 Mar - 6 Apr
Two weeks after your last frost.
Harvest
30 May - 24 Jun
Mung beans through the year
Against the frost risk in Changzheng
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 Changzheng.
The median frost-free season here is 287 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 Changzheng
When should I plant mung beans in Changzheng?
Aim for 16 Mar - 6 Apr in an average year. If you would rather not gamble on the weather, wait until 28 Mar - 18 Apr - by then frost has finished in nine years out of ten.
When will mung beans be ready to harvest in Changzheng?
Expect to start picking around 30 May - 24 Jun, 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.