Rocket · Gunpo, Gyeonggi-do, South Korea
When to plant rocket in Gunpo
Main outdoor window
6-16 Mar
The window this page is built around.
Timed from last spring frost
3 April
In Gunpo, on your chosen risk.
Ready to pick
5-20 Apr
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 Gunpo
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 for overwintering
24 Aug - 14 Sep
Counting back 59 days from your first frost so the crop matures in time.
Sow direct
6-16 Mar
Four weeks before your last frost.
Harvest
5-20 Apr
Rocket through the year
Against the frost risk in Gunpo
Why these dates
Ready in a month. Sow every ten days spring and autumn; skip high summer, when it turns unpleasantly hot and bolts within weeks.
Withstands -7C and holds usable leaf well into winter under cover.
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. Rocket are timed for direct sowing 4 weeks before it, and this page simply resolves those offsets against the frost date computed for Gunpo.
The median frost-free season here is 223 days, against 30 to 45 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Gunpo
Other vegetables to time
Growing rocket in Gunpo
When should I plant rocket in Gunpo?
Aim for 6-16 Mar in an average year. If you would rather not gamble on the weather, wait until 15-25 Mar - by then frost has finished in nine years out of ten.
When will rocket be ready to harvest in Gunpo?
Expect to start picking around 5-20 Apr, based on 30 to 45 days to maturity from the planting date calculated for this location.
How much frost will rocket tolerate?
Withstands -7C and holds usable leaf well into winter under cover.