Annual scabious · Hŭngnam, South Hamgyong, North Korea
When to sow annual scabious in Hŭngnam
Main outdoor window
6 Apr - 4 May
The window this page is built around.
Timed from last spring frost
20 April
In Hŭngnam, on your chosen risk.
Ready to pick
5 Jul - 4 Aug
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 Hŭngnam
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 - 23 Mar
Eight weeks before your last frost, under cover or on a windowsill.
Sow direct
6 Apr - 4 May
Two weeks before your last frost.
Plant out
13 Apr - 11 May
One week before your last frost.
In flower
5 Jul - 4 Aug
Annual scabious through the year
Against the frost risk in Hŭngnam
Why these dates
Sow indoors eight weeks before the last frost and plant out a week before it, or sow direct two weeks before. Pick or deadhead every few days: this is a plant that stops the moment it is allowed to set seed, and keeps going for three months if it is not.
Hardy to about -8C, so young plants take a light frost and autumn sowing works in zone 8 and milder. Keeps flowering through the first autumn frosts.
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. Annual scabious are timed from 8 weeks before that frost for an indoor start, with planting out 1 weeks before it, and this page simply resolves those offsets against the frost date computed for Hŭngnam.
Hardiness is not the obstacle here. Hŭngnam 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 90 to 120 days to first flower for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Hŭngnam
Other flowers to time
Growing annual scabious in Hŭngnam
When should I plant annual scabious in Hŭngnam?
Aim for 6 Apr - 4 May in an average year. If you would rather not gamble on the weather, wait until 12 Apr - 10 May - by then frost has finished in nine years out of ten.
When will annual scabious be ready to harvest in Hŭngnam?
Expect to start picking around 5 Jul - 4 Aug, based on 90 to 120 days to maturity from the planting date calculated for this location.
How much frost will annual scabious tolerate?
Hardy to about -8C, so young plants take a light frost and autumn sowing works in zone 8 and milder. Keeps flowering through the first autumn frosts.