When to plant watermelons in Penza: 2 June – 6 July

In Penza, watermelon: sow for seedlings from 14 April to 8 June; plant into a greenhouse from 12 May to 6 July; plant out into open ground from 2 June to 6 July. For plants and seeds, the places nearby include Зеленый дом (garden centre, 5 km) and Бамбук (garden centre, 7 km); addresses and opening hours are below.

Watermelon in Penza: soil, season and weather

In Penza the soil, not frost, sets the date: the last frost is over around 30 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 2 June, 33 days later.

Last spring frost	30 April
Top 7 cm of soil at 18 °C	2 June, 33 days after the last frost
Into an unheated greenhouse	12 May – 6 July; May outside: 7.4 °C at night, 19.2 °C by day; card 18–35 °C
First autumn frost	15 October, 135 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	31 July – 3 September
Days left for picking	76
Daylight	15:15 on 5 May, 16:38 on 2 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 7 rainy days

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

Watermelon in Penza: care after planting

Planted on 2 June: in the first weeks water every 5 days.

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

2 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 Penza 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: October (10.5 °C). Nights average below 18 °C in every month of the season, from 3.2 °C to 14.9 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.4	12.2	63	11	16:56
July	25.9	14.9	75	11	16:30
August	25.3	13.8	43	7	14:50
September	18	8.2	46	8	12:45
October	10.5	3.2	51	11	10:40

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

All the nearest cities on our list plant watermelon earlier than Penza; the closest date is in Saransk, 1 day earlier.

City	Distance	Date	Difference
Saransk	109 km	1 June – 5 July	1 day earlier
Saratov	198 km	28 May – 17 July	5 days earlier
Tambov	244 km	1 June – 10 July	1 day earlier
Ulyanovsk	255 km	30 May – 14 July	3 days earlier
Tolyatti	290 km	29 May – 14 July	4 days earlier
Samara	342 km	31 May – 12 July	2 days earlier

Where to buy watermelon plants and seeds near Penza

Buy plants ready to set out from 2 June to 6 July (from 12 May to 6 July for an unheated greenhouse); seed for raising your own is sown from 14 April to 8 June. Within 15 km of Penza OpenStreetMap lists 11 garden centres, 1 farm-supply shop, 1 plant nursery, 7 markets and 4 farm shops (collected 27 October 2026).

Наша Дача — garden centre
Комсомольская улица 12/2, Заречный · 11 km · nashadacha-penza.ru
Зеленый дом — garden centre
Mon–Sun 08:00–20:00 · 5 km · garden-zoo.ru
Бамбук — garden centre
улица Собинова 3 к1 · 7 km
Грядка — garden centre
проспект Строителей 37Г · 8 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.

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