When to plant watermelons in Petropavl: 7 June – 20 June

In Petropavl, watermelon: sow for seedlings from 19 April to 23 May; plant into a greenhouse from 17 May to 20 June; plant out into open ground from 7 June to 20 June.

Watermelon in Petropavl: soil, season and weather

In Petropavl the soil, not frost, sets the date: the last frost is over around 8 May, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 7 June, 30 days later. 114 days separate planting out (7 June) from the first autumn frost (29 September); the card's 59 days to the first harvest leave 55 for picking, so a start 7 weeks late would still fit.

Last spring frost	8 May
Top 7 cm of soil at 18 °C	7 June, 30 days after the last frost
Into an unheated greenhouse	17 May – 20 June; May outside: 6.2 °C at night, 19 °C by day; card 18–35 °C
First autumn frost	29 September, 114 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	5 August – 18 August
Days left for picking	55
Daylight	15:47 on 10 May, 17:08 on 7 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 8 rainy days

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

Watermelon in Petropavl: care after planting

Planted on 7 June: in the first weeks water every 5 days.

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

7 June — 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 Petropavl during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 24.8 °C. Months that stay below 18 °C even by day on average: September (15.8 °C). Nights average below 18 °C in every month of the season, from 6.5 °C to 14.7 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	22.4	11.8	66	11	17:18
July	24.8	14.7	78	11	16:49
August	22.8	12.3	52	10	15:01
September	15.8	6.5	42	8	12:48

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

1 of the nearest cities share Petropavl's date.

City	Distance	Date	Difference
Kokshetau	177 km	1 June – 20 June	6 days earlier
Kurgan	250 km	1 June – 22 June	6 days earlier
Omsk	270 km	4 June – 19 June	3 days earlier
Tyumen	339 km	7 June – 22 June	same day
Kostanay	405 km	30 May – 23 June	8 days earlier
Astana	439 km	28 May – 20 June	10 days earlier

Where to buy watermelon plants and seeds near Petropavl

Buy plants ready to set out from 7 June to 20 June (from 17 May to 20 June for an unheated greenhouse); seed for raising your own is sown from 19 April to 23 May. Within 15 km of Petropavl OpenStreetMap lists 11 markets and 2 farm shops (collected 27 October 2026).

Корона — market
4 km
Салем — market
4 km
рынок "Дария" — market
Бостандық көшесі 22а, Петропавловск · 08:00–18:00 · 1 km
Вокзал базары — market
Кошукова 2А · 2 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