Lentil · Chongjin, North Hamgyong, North Korea
When to plant lentils in Chongjin
Main outdoor window
13 Mar - 3 Apr
The window this page is built around.
Timed from last spring frost
10 April
In Chongjin, on your chosen risk.
Ready to pick
1 Jun - 1 Jul
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 Chongjin
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 for autumn
15 Jun - 6 Jul
Counting back 124 days from your first frost so the crop matures in time.
Sow direct
13 Mar - 3 Apr
Four weeks before your last frost.
Harvest
1 Jun - 1 Jul
Lentils through the year
Against the frost risk in Chongjin
Why these dates
Sow four weeks before the last frost. Lentils are short and easily flattened by rain, so a windless site and a firm seedbed both help at harvest.
Seedlings survive to about -6C, which is why lentils are sown far earlier than most pulses.
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. Lentils are timed for direct sowing 4 weeks before it, and this page simply resolves those offsets against the frost date computed for Chongjin.
The median frost-free season here is 212 days, against 80 to 110 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Chongjin
Other grains to time
Growing lentils in Chongjin
When should I plant lentils in Chongjin?
Aim for 13 Mar - 3 Apr in an average year. If you would rather not gamble on the weather, wait until 23 Mar - 13 Apr - by then frost has finished in nine years out of ten.
When will lentils be ready to harvest in Chongjin?
Expect to start picking around 1 Jun - 1 Jul, based on 80 to 110 days to maturity from the planting date calculated for this location.
How much frost will lentils tolerate?
Seedlings survive to about -6C, which is why lentils are sown far earlier than most pulses.