Winter melon · Changwon, Gyeongsangnam-do, South Korea
When to plant winter melons in Changwon
Main outdoor window
25 Mar - 15 Apr
The window this page is built around.
Timed from last spring frost
11 March
In Changwon, on your chosen risk.
Ready to pick
1 Sep - 30 Nov
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 Changwon
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.
Start indoors
4-25 Feb
Five weeks before your last frost, under cover or on a windowsill.
Plant out
25 Mar - 15 Apr
Two weeks after your last frost.
Harvest
1 Sep - 30 Nov
Winter melons through the year
Against the frost risk in Changwon
Why these dates
Start indoors five weeks before the last frost and plant out two weeks after it. It needs a longer warm run than a pumpkin, so it is marginal in cool summers.
Killed at 0C. The wax bloom that makes it store so well only develops on fully mature fruit, which needs the whole season.
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. Winter melons are timed from 5 weeks before that frost for an indoor start, with planting out 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Changwon.
The median frost-free season here is 267 days, against 110 to 140 days to maturity for this crop counted from planting out. That margin is what decides whether a late sowing is worth attempting.
Also in Changwon
Other vegetables to time
Growing winter melons in Changwon
When should I plant winter melons in Changwon?
Aim for 25 Mar - 15 Apr in an average year. If you would rather not gamble on the weather, wait until 8-29 Apr - by then frost has finished in nine years out of ten.
When will winter melons be ready to harvest in Changwon?
Expect to start picking around 1 Sep - 30 Nov, based on 110 to 140 days to maturity from the planting date calculated for this location.
How much frost will winter melons tolerate?
Killed at 0C. The wax bloom that makes it store so well only develops on fully mature fruit, which needs the whole season.