Tomato · Geoje, Gyeongsangnam-do, South Korea
When to plant tomatoes in Geoje
Main outdoor window
25 Mar - 15 Apr
The window this page is built around.
Timed from last spring frost
11 March
In Geoje, on your chosen risk.
Ready to pick
24 May - 18 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 Geoje
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
28 Jan - 18 Feb
Six weeks before your last frost, under cover or on a windowsill.
Plant out
25 Mar - 15 Apr
Two weeks after your last frost.
Harvest
24 May - 18 Jun
Tomatoes through the year
Against the frost risk in Geoje
Why these dates
Six weeks of indoor growing produces a stocky transplant with a first flower truss forming. Starting earlier than eight weeks usually backfires: the plant becomes leggy and root-bound, and gains nothing on a plant sown later.
Tomato foliage is damaged at 0C and killed outright at about -1C. There is no recovery from a frosted plant, so the transplant date is the single most consequential decision in the tomato year.
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. Tomatoes are timed from 6 weeks before that frost for an indoor start, with planting out 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Geoje.
The median frost-free season here is 267 days, against 60 to 85 days to maturity for this crop counted from planting out. That margin is what decides whether a late sowing is worth attempting.
Also in Geoje
Other vegetables to time
Growing tomatoes in Geoje
When should I plant tomatoes in Geoje?
Aim for 25 Mar - 15 Apr in an average year. If you would rather not gamble on the weather, wait until 8-29 Apr - by then frost has finished in nine years out of ten.
When will tomatoes be ready to harvest in Geoje?
Expect to start picking around 24 May - 18 Jun, based on 60 to 85 days to maturity from the planting date calculated for this location.
How much frost will tomatoes tolerate?
Tomato foliage is damaged at 0C and killed outright at about -1C. There is no recovery from a frosted plant, so the transplant date is the single most consequential decision in the tomato year.