GreenlyWhen to plant cucumber in Irkutsk
In Irkutsk, cucumber: sow seedlings around 13 April for the greenhouse and around 4 May for open ground; plant into a greenhouse around 25 May; plant out into open ground around 15 June.
Last spring frost around 14 May, first autumn frost around 30 September. Frost-free days: 139 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.