When to plant watermelons in Ulyanovsk: 30 May – 14 July

In Ulyanovsk, watermelon: sow for seedlings from 11 April to 16 June; plant into a greenhouse from 9 May to 14 July; plant out into open ground from 30 May to 14 July.

Watermelon in Ulyanovsk: soil, season and weather

In Ulyanovsk the soil, not frost, sets the date: the last frost is over around 16 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 30 May, 44 days later.

Last spring frost	16 April
Top 7 cm of soil at 18 °C	30 May, 44 days after the last frost
Into an unheated greenhouse	9 May – 14 July; May outside: 9 °C at night, 18.6 °C by day; card 18–35 °C
First autumn frost	23 October, 146 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	28 July – 11 September
Days left for picking	87
Daylight	15:12 on 2 May, 16:45 on 30 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 8 rainy days

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

Watermelon in Ulyanovsk: care after planting

Planted on 30 May: in the first weeks water every 5 days.

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

30 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 Ulyanovsk during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 25.9 °C. Months that stay below 18 °C even by day on average: September (17.4 °C) and October (9.8 °C). Nights average below 18 °C in every month of the season, from 4 °C to 17.3 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	18.6	9	51	9	16:00
June	23	14.5	46	10	17:11
July	25.9	17.3	51	8	16:43
August	24.8	15.9	48	7	14:57
September	17.4	9.8	45	8	12:47
October	9.8	4	48	11	10:37

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Ulyanovsk, Tolyatti is 1 day earlier and Cheboksary 3 days later.

City	Distance	Date	Difference
Tolyatti	109 km	29 May – 14 July	1 day earlier
Kazan	169 km	1 June – 4 July	2 days later
Samara	171 km	31 May – 12 July	1 day later
Saransk	210 km	1 June – 5 July	2 days later
Cheboksary	213 km	2 June – 8 July	3 days later
Penza	255 km	2 June – 6 July	3 days later

Where to buy watermelon plants and seeds near Ulyanovsk

Buy plants ready to set out from 30 May to 14 July (from 9 May to 14 July for an unheated greenhouse); seed for raising your own is sown from 11 April to 16 June. Within 15 km of Ulyanovsk OpenStreetMap lists 4 garden centres, 1 farm-supply shop, 1 plant nursery and 4 markets (collected 27 October 2026).

Дачник — garden centre
9 km
Областная станция юных натуралистов — plant nursery
4 km
Южный рынок — market
4 km
Ланцет — market
6 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