Cauliflower · Hamhŭng, South Hamgyong, North Korea
When to plant cauliflowers in Hamhŭng
Main outdoor window
6-27 Apr
The window this page is built around.
Timed from last spring frost
20 April
In Hamhŭng, on your chosen risk.
Ready to pick
10 Jun - 10 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 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
2-23 Mar
Seven weeks before your last frost, under cover or on a windowsill.
Sow for autumn
13 Jun - 4 Jul
Counting back 109 days from your first frost so the crop matures in time.
Plant out
6-27 Apr
Two weeks before your last frost.
Harvest
10 Jun - 10 Jul
Cauliflowers through the year
Against the frost risk in Hamhŭng
Why these dates
Steady moisture and steady temperature matter more than the exact sowing week. Autumn maturity is easier to achieve than spring in most climates.
Tolerates light frost but the curd itself is damaged below about -3C. Fold leaves over developing heads when frost threatens.
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. Cauliflowers are timed from 7 weeks before that frost for an indoor start, with planting out 2 weeks before it, and this page simply resolves those offsets against the frost date computed for Hamhŭng.
The median frost-free season here is 185 days, against 65 to 95 days to maturity for this crop counted from planting out. That margin is what decides whether a late sowing is worth attempting.
Also in Hamhŭng
Other vegetables to time
Growing cauliflowers in Hamhŭng
When should I plant cauliflowers in Hamhŭng?
Aim for 6-27 Apr in an average year. If you would rather not gamble on the weather, wait until 12 Apr - 3 May - by then frost has finished in nine years out of ten.
When will cauliflowers be ready to harvest in Hamhŭng?
Expect to start picking around 10 Jun - 10 Jul, based on 65 to 95 days to maturity from the planting date calculated for this location.
How much frost will cauliflowers tolerate?
Tolerates light frost but the curd itself is damaged below about -3C. Fold leaves over developing heads when frost threatens.