Candytuft · Hamhŭng, South Hamgyong, North Korea
When to sow candytufts in Hamhŭng
Main outdoor window
30 Mar - 20 Apr
The window this page is built around.
Timed from last spring frost
20 April
In Hamhŭng, on your chosen risk.
Ready to pick
24 May - 13 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.
Sow direct
30 Mar - 20 Apr
Three weeks before your last frost.
In flower
24 May - 13 Jun
Candytufts through the year
Against the frost risk in Hamhŭng
Why these dates
Sow direct three weeks before the last frost where it is to flower. It has a short season, roughly five weeks, so sow in succession every three weeks for a continuous show. Cut back hard after flowering and a second flush sometimes follows.
Hardy to about -10C, so it can be autumn-sown in zone 7 and milder for late spring flowers. Finishes quickly once the weather turns hot.
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. Candytufts are timed for direct sowing 3 weeks before it, and this page simply resolves those offsets against the frost date computed for Hamhŭng.
Hardiness is not the obstacle here. Hamhŭng is zone 6a, comfortably inside the range this crop is rated for, so an established plant should come through an average winter without protection.
The median frost-free season here is 185 days, against 55 to 75 days to first flower for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Hamhŭng
Other flowers to time
Growing candytufts in Hamhŭng
When should I plant candytufts in Hamhŭng?
Aim for 30 Mar - 20 Apr in an average year. If you would rather not gamble on the weather, wait until 5-26 Apr - by then frost has finished in nine years out of ten.
When will candytufts be ready to harvest in Hamhŭng?
Expect to start picking around 24 May - 13 Jun, based on 55 to 75 days to maturity from the planting date calculated for this location.
How much frost will candytufts tolerate?
Hardy to about -10C, so it can be autumn-sown in zone 7 and milder for late spring flowers. Finishes quickly once the weather turns hot.