Mung bean · Shangzhi, Heilongjiang, China
When to plant mung beans in Shangzhi
Main outdoor window
20 May - 10 Jun
The window this page is built around.
Timed from last spring frost
6 May
In Shangzhi, on your chosen risk.
Ready to pick
3-28 Aug
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 Shangzhi
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
20 May - 10 Jun
Two weeks after your last frost.
Harvest
3-28 Aug
Mung beans through the year
Against the frost risk in Shangzhi
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 Shangzhi.
The median frost-free season here is 151 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 Shangzhi
When should I plant mung beans in Shangzhi?
Aim for 20 May - 10 Jun in an average year. If you would rather not gamble on the weather, wait until 24 May - 14 Jun - by then frost has finished in nine years out of ten.
When will mung beans be ready to harvest in Shangzhi?
Expect to start picking around 3-28 Aug, 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.