Edamame · Chũ, Bac Ninh, Vietnam
When to plant edamame in Chũ
Main outdoor window
22 Jan - 12 Feb
The window this page is built around.
Timed from last spring frost
8 January
In Chũ, on your chosen risk.
Ready to pick
1 Aug - 30 Sep
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 Chũ
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
22 Jan - 12 Feb
Two weeks after your last frost.
Harvest
1 Aug - 30 Sep
Edamame through the year
Against the frost risk in Chũ
Why these dates
Sow two weeks after the last frost. Pods on a plant fill almost simultaneously, so the harvest window is about a week and succession sowing is the only way to extend it.
Killed at 0C. Flowering is triggered by day length, so a variety chosen for the wrong latitude flowers at the wrong time regardless of sowing date.
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. Edamame are timed for direct sowing 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Chũ.
The median frost-free season here is 351 days, against 75 to 95 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Chũ
Other vegetables to time
Growing edamame in Chũ
When should I plant edamame in Chũ?
Aim for 22 Jan - 12 Feb in an average year. If you would rather not gamble on the weather, wait until 5-26 Feb - by then frost has finished in nine years out of ten.
When will edamame be ready to harvest in Chũ?
Expect to start picking around 1 Aug - 30 Sep, based on 75 to 95 days to maturity from the planting date calculated for this location.
How much frost will edamame tolerate?
Killed at 0C. Flowering is triggered by day length, so a variety chosen for the wrong latitude flowers at the wrong time regardless of sowing date.