Watermelon · Korolev, Moscow Oblast, Russia
When to plant watermelons in Korolev
Main outdoor window
17 May - 7 Jun
The window this page is built around.
Timed from last spring frost
3 May
In Korolev, on your chosen risk.
Ready to pick
1 Aug - 30 Sep
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 Korolev
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
29 Mar - 19 Apr
Five weeks before your last frost, under cover or on a windowsill.
Plant out
17 May - 7 Jun
Two weeks after your last frost.
Harvest
1 Aug - 30 Sep
Watermelons through the year
Against the frost risk in Korolev
Why these dates
Start indoors five weeks before the last frost in pots that will not disturb the roots, and plant out two weeks after it under fleece or black plastic to lift soil temperature.
Killed at 0C, and checked hard by anything below 12C. Frost dates matter less here than the run of warm nights between them.
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. Watermelons are timed from 5 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 Korolev.
The median frost-free season here is 157 days, against 80 to 110 days to maturity for this crop counted from planting out. That margin is what decides whether a late sowing is worth attempting.
Nearby
Watermelons in places close by
Also in Korolev
Other vegetables to time
Growing watermelons in Korolev
When should I plant watermelons in Korolev?
Aim for 17 May - 7 Jun in an average year. If you would rather not gamble on the weather, wait until 1-22 Jun - by then frost has finished in nine years out of ten.
When will watermelons be ready to harvest in Korolev?
Expect to start picking around 1 Aug - 30 Sep, based on 80 to 110 days to maturity from the planting date calculated for this location.
How much frost will watermelons tolerate?
Killed at 0C, and checked hard by anything below 12C. Frost dates matter less here than the run of warm nights between them.