When to plant watermelons in Ulan-Ude: 12 June – 20 June

In Ulan-Ude, watermelon: sow for seedlings from 24 April to 23 May; plant into a greenhouse from 22 May to 20 June; plant out into open ground from 12 June to 20 June. For plants and seeds, the places nearby include Сагаан Дали (farm shop, 6 km); addresses and opening hours are below.

Watermelon in Ulan-Ude: soil, season and weather

In Ulan-Ude the soil, not frost, sets the date: the last frost is over around 13 May, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 12 June, 30 days later. 109 days separate planting out (12 June) from the first autumn frost (29 September); the card's 59 days to the first harvest leave 50 for picking, so a start 7 weeks late would still fit.

Last spring frost	13 May
Top 7 cm of soil at 18 °C	12 June, 30 days after the last frost
Into an unheated greenhouse	22 May – 20 June; May outside: 4.3 °C at night, 17.5 °C by day; card 18–35 °C
First autumn frost	29 September, 109 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	10 August – 18 August
Days left for picking	50
Daylight	15:38 on 15 May, 16:38 on 12 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, June, has 7 rainy days

The same dates in Ulan-Ude hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Ulan-Ude: care after planting

Planted on 12 June: in the first weeks water every 5 days.

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

12 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 Ulan-Ude during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 26.9 °C. Months that stay below 18 °C even by day on average: September (16.6 °C). Nights average below 18 °C in every month of the season, from 6.2 °C to 15.6 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	24.8	12.4	37	7	16:40
July	26.9	15.6	63	10	16:15
August	23.5	13.2	73	10	14:41
September	16.6	6.2	40	9	12:43

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

All the nearest cities on our list plant watermelon later than Ulan-Ude; the closest date is in Kemerovo, 1 day later.

City	Distance	Date	Difference
Irkutsk	231 km	15 June – 21 June	3 days later
Chita	404 km	22 June – 26 July	10 days later
Krasnoyarsk	1,069 km	18 June – 18 June	6 days later
Novokuznetsk	1,387 km	14 June – 21 June	2 days later
Blagoveshchensk	1,399 km	15 June – 24 June	3 days later
Kemerovo	1,465 km	13 June – 17 June	1 day later

Where to buy watermelon plants and seeds near Ulan-Ude

Buy plants ready to set out from 12 June to 20 June (from 22 May to 20 June for an unheated greenhouse); seed for raising your own is sown from 24 April to 23 May. Within 15 km of Ulan-Ude OpenStreetMap lists 1 garden centre and 1 farm shop (collected 27 October 2026).

Сагаан Дали — farm shop
Зеленоградская улица 3А · 6 km
Семена — garden centre
11 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