Sweetcorn · Geoje, Gyeongsangnam-do, South Korea

When to plant sweetcorn in Geoje

Main outdoor window

18 Mar - 1 Apr

The window this page is built around.

Timed from last spring frost

11 March

In Geoje, on your chosen risk.

Ready to pick

17 May - 26 Jun

If you plant at the start of the window.

The average last frost. Half of all years are later than this.

Cautious Balanced Bold

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.

Sow direct

18 Mar - 1 Apr

One week after your last frost.

Harvest

17 May - 26 Jun

Sow in succession. A single sowing gives you a single glut. Sow a short row every 14 days through the window above and you get a steady supply instead.

Frost tolerance

Tender

Damaged below

0°C (32°F)

Days to maturity

60–100

Min soil temp

15°C (59°F)

Spacing

30 cm

Sowing depth

30 mm (1.2 in)

Sun

Full

Sweetcorn through the year

Against the frost risk in Geoje

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sweetcorn

Frost risk Sow direct Harvest Today

Why these dates

Seed rots in cold wet soil. Sowing a week after last frost into 15C soil beats sowing on the frost date into 10C soil almost every time.

Seedlings survive a very light frost if the growing point is still below soil level, but growth stalls. Mature plants are killed outright.

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. Sweetcorn are timed for direct sowing 1 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 100 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.

See every crop timed for Geoje →

Nearby

Sweetcorn in places close by

Busan 44 km Changwon 46 km Kimhae 49 km Yangsan 66 km Chinju 71 km Yeosu 95 km

Also in Geoje

Other vegetables to time

Tomatoes tender Lettuce half hardy Potatoes half hardy Courgettes tender Sweet peppers tender Carrots hardy Cucumbers tender Green beans tender Peas hardy Garlic very hardy Chilli peppers tender

Growing sweetcorn in Geoje

When should I plant sweetcorn in Geoje?

Aim for 18 Mar - 1 Apr in an average year. If you would rather not gamble on the weather, wait until 1-15 Apr - by then frost has finished in nine years out of ten.

When will sweetcorn be ready to harvest in Geoje?

Expect to start picking around 17 May - 26 Jun, based on 60 to 100 days to maturity from the planting date calculated for this location.

How much frost will sweetcorn tolerate?

Seedlings survive a very light frost if the growing point is still below soil level, but growth stalls. Mature plants are killed outright.