Burdock · Hanam, Gyeonggi-do, South Korea
When to plant burdock in Hanam
Main outdoor window
12 Apr - 3 May
The window this page is built around.
Timed from last spring frost
12 April
In Hanam, on your chosen risk.
Ready to pick
1 Sep - 30 Nov
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 Hanam
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
12 Apr - 3 May
Around your last frost.
Harvest
1 Sep - 30 Nov
Burdock through the year
Against the frost risk in Hanam
Why these dates
Sow around the last frost date and lift from autumn onwards, once the root has had a full season to extend. Roots left in the ground keep perfectly well over winter.
The root is hardy to -8C and below, so lifting can be spread across the whole winter rather than done all at once.
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. Burdock are timed for direct sowing 0 weeks after it, and this page simply resolves those offsets against the frost date computed for Hanam.
The median frost-free season here is 199 days, against 100 to 140 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Hanam
Other vegetables to time
Growing burdock in Hanam
When should I plant burdock in Hanam?
Aim for 12 Apr - 3 May in an average year. If you would rather not gamble on the weather, wait until 25 Apr - 16 May - by then frost has finished in nine years out of ten.
When will burdock be ready to harvest in Hanam?
Expect to start picking around 1 Sep - 30 Nov, based on 100 to 140 days to maturity from the planting date calculated for this location.
How much frost will burdock tolerate?
The root is hardy to -8C and below, so lifting can be spread across the whole winter rather than done all at once.