When to plant watermelons in Semey: 28 May – 20 June

In Semey, watermelon: sow for seedlings from 9 April to 23 May; plant into a greenhouse from 7 May to 20 June; plant out into open ground from 28 May to 20 June.

Watermelon in Semey: soil, season and weather

In Semey the soil, not frost, sets the date: the last frost is over around 25 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 28 May, 33 days later.

Last spring frost	25 April
Top 7 cm of soil at 18 °C	28 May, 33 days after the last frost
Into an unheated greenhouse	7 May – 20 June; May outside: 7.9 °C at night, 21.3 °C by day; card 18–35 °C
First autumn frost	29 September, 124 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	26 July – 18 August
Days left for picking	65
Daylight	14:39 on 30 April, 15:59 on 28 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, May, has 7 rainy days

The same dates in Semey hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Semey: care after planting

Planted on 28 May: in the first weeks water every 5 days.

Feeding, by the card’s schedule from that day:

28 May — feed: balanced (NPK)

Pests and diseases of watermelon to watch for:

Dates count from the first planting day of the window above; a later planting moves them by as many days.

Weather in Semey during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 27.9 °C. Nights average below 18 °C in every month of the season, from 7.3 °C to 16.4 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	21.3	7.9	28	7	15:27
June	26.9	14.7	37	8	16:25
July	27.9	16.4	43	10	16:02
August	25.7	13.9	42	8	14:33
September	18.9	7.3	33	7	12:41

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Semey, Pavlodar is 1 day earlier and Novokuznetsk 17 days later.

City	Distance	Date	Difference
Oskemen	177 km	28 May – 22 June	same day
Pavlodar	308 km	27 May – 25 June	1 day earlier
Barnaul	406 km	8 June – 20 June	11 days later
Karaganda	514 km	28 May – 20 June	same day
Novosibirsk	543 km	13 June – 19 June	16 days later
Novokuznetsk	599 km	14 June – 21 June	17 days later

Where to buy watermelon plants and seeds near Semey

Buy plants ready to set out from 28 May to 20 June (from 7 May to 20 June for an unheated greenhouse); seed for raising your own is sown from 9 April to 23 May. Within 15 km of Semey OpenStreetMap lists 2 markets (collected 27 October 2026).

Мереке — market
342-ый квартал 9774, Семей · 2 km
Рынок — market
0 km

Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

Questions