When to plant watermelons in Petrozavodsk: 1 July – 8 July

In Petrozavodsk, watermelon: sow for seedlings from 13 May to 10 June; plant into a greenhouse from 10 June to 8 July; plant out into open ground from 1 July to 8 July. For plants and seeds, the places nearby include Клевер (garden centre, 3 km) and Эссойла (farm shop, 5 km); addresses and opening hours are below.

Watermelon in Petrozavodsk: soil, season and weather

In Petrozavodsk the soil, not frost, sets the date: the last frost is over around 10 May, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 1 July, 52 days later. 108 days separate planting out (1 July) from the first autumn frost (17 October); the card's 59 days to the first harvest leave 49 for picking, so a start 7 weeks late would still fit.

Last spring frost	10 May
Top 7 cm of soil at 18 °C	1 July, 52 days after the last frost
Into an unheated greenhouse	10 June – 8 July; June outside: 10 °C at night, 18.8 °C by day; card 18–35 °C
First autumn frost	17 October, 108 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	29 August – 5 September
Days left for picking	49
Daylight	19:03 on 3 June, 19:29 on 1 July
Watering outdoors when fruiting (card)	every 5 days; the driest month, October, has 12 rainy days

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

Watermelon in Petrozavodsk: care after planting

Planted on 1 July: in the first weeks water every 5 days.

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

1 July — 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 Petrozavodsk during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 20.7 °C. Months that stay below 18 °C even by day on average: September (14 °C) and October (6.2 °C). Nights average below 18 °C in every month of the season, from 1.6 °C to 13 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
July	20.7	13	107	16	18:43
August	19.1	11.9	104	15	16:01
September	14	7.7	67	12	13:01
October	6.2	1.6	65	12	10:07

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Petrozavodsk, Veliky Novgorod is 19 days earlier and Arkhangelsk 11 days later.

City	Distance	Date	Difference
Saint Petersburg	299 km	17 June – 11 July	14 days earlier
Cherepovets	353 km	22 June – 8 July	9 days earlier
Veliky Novgorod	400 km	12 June – 10 July	19 days earlier
Vologda	415 km	22 June – 1 July	9 days earlier
Arkhangelsk	438 km	12 July – 10 August	11 days later
Helsinki	538 km	17 June – 11 July	14 days earlier

Where to buy watermelon plants and seeds near Petrozavodsk

Buy plants ready to set out from 1 July to 8 July (from 10 June to 8 July for an unheated greenhouse); seed for raising your own is sown from 13 May to 10 June. Within 15 km of Petrozavodsk OpenStreetMap lists 8 garden centres and 2 farm shops (collected 27 October 2026).

Клевер — garden centre
Mon–Sun 10:00–20:00 · 3 km
Эссойла — farm shop
Ключевая улица, Петрозаводск · 5 km
Всё для сада — garden centre
2 km
Дачник — garden centre
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.

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