When to plant zucchini in Kostroma: 18 June – 25 July

In Kostroma, zucchini: sow for seedlings from 7 May to 4 July; plant into a greenhouse from 28 May to 25 July; plant out into open ground from 18 June to 25 July. For plants and seeds, the places nearby include Десяточка экспресс (farm shop, 2 km); addresses and opening hours are below.

Zucchini in Kostroma: soil, season and weather

In Kostroma the soil, not frost, sets the date: the last frost is over around 6 May, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 18 June, 43 days later.

Last spring frost	6 May
Top 7 cm of soil at 18 °C	18 June, 43 days after the last frost
First autumn frost	11 October, 115 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	24 July – 30 August
Days left for picking	79
Daylight	17:25 on 28 May, 18:06 on 18 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, September, has 11 rainy days

The same dates in Kostroma hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.

Zucchini in Kostroma: care after planting

Planted on 18 June: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Kostroma during the zucchini season

About 342 mm of rain falls in the season; September is the driest month (56 mm) and July the wettest (82 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	20.8	11	78	12	18:04
July	23.4	14.1	82	14	17:28
August	21.9	12.6	63	11	15:23
September	15.6	7.8	56	11	12:53
October	8	2.4	63	14	10:25

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Kostroma, Nizhny Novgorod is 16 days earlier and Vologda 4 days later.

City	Distance	Date	Difference
Yaroslavl	65 km	15 June – 24 July	3 days earlier
Ivanovo	86 km	15 June – 25 July	3 days earlier
Vologda	172 km	22 June – 24 July	4 days later
Vladimir	184 km	13 June – 29 July	5 days earlier
Cherepovets	232 km	22 June – 31 July	4 days later
Nizhny Novgorod	245 km	2 June – 1 August	16 days earlier

Where to buy zucchini plants and seeds near Kostroma

Buy plants ready to set out from 18 June to 25 July (from 28 May to 25 July for an unheated greenhouse); seed for raising your own is sown from 7 May to 4 July. Within 15 km of Kostroma OpenStreetMap lists 2 garden centres, 2 markets and 1 farm shop (collected 27 October 2026).

Десяточка экспресс — farm shop
Московская улица 19, 156001 Кострома · Mon–Sun 08:00–22:00 · 2 km
Сияние — garden centre
0 km
Дачник — garden centre
1 km
Ярмарка на Островского — market
1 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