Pak choi · Goyang-si, Gyeonggi-do, South Korea
When to plant pak choi in Goyang-si
Main outdoor window
20 Mar - 3 Apr
The window this page is built around.
Timed from last spring frost
3 April
In Goyang-si, on your chosen risk.
Ready to pick
29 Apr - 14 May
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 Goyang-si
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
6-20 Mar
Four weeks before your last frost, under cover or on a windowsill.
Sow for autumn
14 Aug - 4 Sep
Counting back 69 days from your first frost so the crop matures in time.
Sow direct
20 Mar - 3 Apr
Two weeks before your last frost.
Plant out
27 Mar - 10 Apr
One week before your last frost.
Harvest
29 Apr - 14 May
Pak choi through the year
Against the frost risk in Goyang-si
Why these dates
The autumn sowing is the dependable one. Spring sowings bolt readily unless made very early or grown under cover.
Handles a few degrees of frost. A hard freeze destroys the succulent midribs.
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. Pak choi are timed from 4 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 Goyang-si.
The median frost-free season here is 223 days, against 40 to 55 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Goyang-si
Other vegetables to time
Growing pak choi in Goyang-si
When should I plant pak choi in Goyang-si?
Aim for 20 Mar - 3 Apr in an average year. If you would rather not gamble on the weather, wait until 29 Mar - 12 Apr - by then frost has finished in nine years out of ten.
When will pak choi be ready to harvest in Goyang-si?
Expect to start picking around 29 Apr - 14 May, based on 40 to 55 days to maturity from the planting date calculated for this location.
How much frost will pak choi tolerate?
Handles a few degrees of frost. A hard freeze destroys the succulent midribs.