When to plant watermelons in Stary Oskol: 29 May – 13 July

In Stary Oskol, watermelon: sow for seedlings from 10 April to 15 June; plant into a greenhouse from 8 May to 13 July; plant out into open ground from 29 May to 13 July.

Watermelon in Stary Oskol: soil, season and weather

In Stary Oskol the soil, not frost, sets the date: the last frost is over around 23 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 29 May, 36 days later.

Last spring frost	23 April
Top 7 cm of soil at 18 °C	29 May, 36 days after the last frost
Into an unheated greenhouse	8 May – 13 July; May outside: 8.7 °C at night, 19.4 °C by day; card 18–35 °C
First autumn frost	22 October, 146 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	27 July – 10 September
Days left for picking	87
Daylight	14:48 on 1 May, 16:10 on 29 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 6 rainy days

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

Watermelon in Stary Oskol: care after planting

Planted on 29 May: in the first weeks water every 5 days.

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

29 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 Stary Oskol during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 26.5 °C. Months that stay below 18 °C even by day on average: October (12.5 °C). Nights average below 18 °C in every month of the season, from 4.7 °C to 16 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19.4	8.7	65	13	15:34
June	24.5	14	69	11	16:34
July	26.4	16	73	11	16:10
August	26.5	15.4	35	6	14:38
September	20.1	10	35	6	12:42
October	12.5	4.7	58	9	10:46

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Stary Oskol, Kharkiv is 2 days earlier and Belgorod 1 day later.

City	Distance	Date	Difference
Voronezh	102 km	29 May – 20 July	same day
Belgorod	118 km	30 May – 11 July	1 day later
Kursk	125 km	29 May – 12 July	same day
Lipetsk	185 km	29 May – 8 July	same day
Kharkiv	185 km	27 May – 12 July	2 days earlier
Sumy	217 km	29 May – 11 July	same day

Where to buy watermelon plants and seeds near Stary Oskol

Buy plants ready to set out from 29 May to 13 July (from 8 May to 13 July for an unheated greenhouse); seed for raising your own is sown from 10 April to 15 June. Within 15 km of Stary Oskol OpenStreetMap lists 3 garden centres, 3 markets and 1 farm shop (collected 27 October 2026).

Парус — garden centre
3 km
Экос — garden centre
7 km
р-к Болгарский — market
3 km
Фрукт и Овощ — farm shop
4 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