Mung bean · Sunch’ŏn, South Pyongan, North Korea
When to plant mung beans in Sunch’ŏn
Main outdoor window
27 Apr - 18 May
The window this page is built around.
Timed from last spring frost
13 April
In Sunch’ŏn, on your chosen risk.
Ready to pick
11 Jul - 5 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 Sunch’ŏn
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
27 Apr - 18 May
Two weeks after your last frost.
Harvest
11 Jul - 5 Aug
Mung beans through the year
Against the frost risk in Sunch’ŏn
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 Sunch’ŏn.
The median frost-free season here is 200 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 Sunch’ŏn
When should I plant mung beans in Sunch’ŏn?
Aim for 27 Apr - 18 May in an average year. If you would rather not gamble on the weather, wait until 8-29 May - by then frost has finished in nine years out of ten.
When will mung beans be ready to harvest in Sunch’ŏn?
Expect to start picking around 11 Jul - 5 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.