GreenlyWhen to plant watermelon in Perm
In Perm, watermelon: sow seedlings around 30 April for the greenhouse and around 21 May for open ground; plant into a greenhouse around 1 June; plant out into open ground around 22 June.
Last spring frost around 6 May, first autumn frost around 2 October. Frost-free days: 149 days.
The dates follow the Greenly calendar: open ground a week after the last frost once the soil is warm enough for the crop, frost-hardy crops three weeks before it, an unheated greenhouse three weeks earlier, seedlings sown so they are ready on the day. In a cold year allow a week or two more.