When to plant tomatoes in Petrozavodsk: 21 June – 27 June

In Petrozavodsk, tomato: sow for seedlings from 9 April to 6 May; plant into a greenhouse from 31 May to 27 June; plant out into open ground from 21 June to 27 June. For plants and seeds, the places nearby include Клевер (garden centre, 1 km) and Клевер (garden centre, 2 km); addresses and opening hours are below.

Tomato 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 15 °C — the minimum on the tomato card — only around 21 June, 42 days later. 118 days separate planting out (21 June) from the first autumn frost (17 October); the card's 70 days to the first harvest leave 48 for picking, so a start 6 weeks late would still fit.

Last spring frost	10 May
Top 7 cm of soil at 15 °C	21 June, 42 days after the last frost
Into an unheated greenhouse	31 May – 27 June; May outside: 3.9 °C at night, 13 °C by day; card 16–27 °C
First autumn frost	17 October, 118 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	30 August – 5 September
Days left for picking	48
Daylight	16:11 on 30 April, 19:39 on 21 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, June, has 12 rainy days

Tomato in Petrozavodsk: care after planting

Planted on 21 June: in the first weeks water every 4 days.

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

21 June — feed: balanced (NPK)
19 July — feed: nitrogen

Pests and diseases of tomato 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 tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, July, averages 20.7 °C. Months that stay below 16 °C even by day on average: September (14 °C) and October (6.2 °C). Nights average below 16 °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
June	18.8	10	63	12	19:34
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

Tomato in nearby cities

All the nearest cities on our list plant tomato earlier than Petrozavodsk; the closest date is in Arkhangelsk, 13 days earlier.

City	Distance	Date	Difference
Saint Petersburg	299 km	28 May – 30 June	24 days earlier
Cherepovets	353 km	3 June – 27 June	18 days earlier
Veliky Novgorod	400 km	27 May – 29 June	25 days earlier
Vologda	415 km	27 May – 20 June	25 days earlier
Arkhangelsk	438 km	8 June – 18 June	13 days earlier
Helsinki	538 km	2 June – 30 June	19 days earlier

Where to buy tomato plants and seeds near Petrozavodsk

Buy plants ready to set out from 21 June to 27 June (from 31 May to 27 June for an unheated greenhouse); seed for raising your own is sown from 9 April to 6 May. Within 15 km of Petrozavodsk OpenStreetMap lists 8 garden centres and 2 farm shops (collected 27 October 2026).

Ландшафт — garden centre
Mon–Fri 09:00–19:00; Sat, Sun 09:00–18:00 · 7 km
Клевер — garden centre
Mon–Sun 10:00–20:00 · 1 km
Клевер — garden centre
Mon–Fri 10:00–19:00; Sat, Sun 11:00–17:00 · 2 km
Крокус — garden centre
Mon–Fri 11:00–20:00; Sat 11:00–18:00; Sun 11:00–17:00 · 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.

Questions