Candytuft · Tŏkch’ŏn, South Pyongan, North Korea
When to sow candytufts in Tŏkch’ŏn
Main outdoor window
5-26 Apr
The window this page is built around.
Timed from last spring frost
26 April
In Tŏkch’ŏn, on your chosen risk.
Ready to pick
30 May - 19 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 Tŏkch’ŏn
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
5-26 Apr
Three weeks before your last frost.
In flower
30 May - 19 Jun
Candytufts through the year
Against the frost risk in Tŏkch’ŏn
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 Tŏkch’ŏn.
Hardiness is not the obstacle here. Tŏkch’ŏn is zone 5b, 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 172 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 Tŏkch’ŏn
Other flowers to time
Growing candytufts in Tŏkch’ŏn
When should I plant candytufts in Tŏkch’ŏn?
Aim for 5-26 Apr in an average year. If you would rather not gamble on the weather, wait until 15 Apr - 6 May - by then frost has finished in nine years out of ten.
When will candytufts be ready to harvest in Tŏkch’ŏn?
Expect to start picking around 30 May - 19 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.