Chives · Hamhŭng, South Hamgyong, North Korea
When to plant chives in Hamhŭng
Main outdoor window
23 Mar - 13 Apr
The window this page is built around.
Timed from last spring frost
20 April
In Hamhŭng, on your chosen risk.
Ready to pick
22 May - 21 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 Hamhŭng
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
23 Feb - 16 Mar
Eight weeks before your last frost, under cover or on a windowsill.
Sow direct
23 Mar - 13 Apr
Four weeks before your last frost.
Plant
23 Mar - 13 Apr
Four weeks before your last frost.
Harvest
22 May - 21 Jun
Chives through the year
Against the frost risk in Hamhŭng
Why these dates
Sow once and divide every third year. First-year plants are thin; the crop is properly established in year two.
Fully dormant-hardy to -25C. Emerges as soon as soil temperature passes about 5C, often weeks before the last frost.
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. Chives are timed from 8 weeks before that frost for an indoor start, with planting out 4 weeks before it, and this page simply resolves those offsets against the frost date computed for Hamhŭng.
Growing chives in Hamhŭng
When should I plant chives in Hamhŭng?
Aim for 23 Mar - 13 Apr in an average year. If you would rather not gamble on the weather, wait until 29 Mar - 19 Apr - by then frost has finished in nine years out of ten.
When will chives be ready to harvest in Hamhŭng?
Expect to start picking around 22 May - 21 Jun, based on 60 to 90 days to maturity from the planting date calculated for this location.
How much frost will chives tolerate?
Fully dormant-hardy to -25C. Emerges as soon as soil temperature passes about 5C, often weeks before the last frost.