GreenlyWhen to plant watermelon in Marseille
In Marseille, watermelon: sow seedlings around 18 March for the greenhouse and around 8 April for open ground; plant into a greenhouse around 19 April; plant out into open ground around 10 May.
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.