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When to plant crocuses in Petrozavodsk: 17 September – 24 October

In Petrozavodsk, crocus: plant from 17 September to about 24 October. For planting stock, the places nearby include Клевер (garden centre, 1 km) and Клевер (garden centre, 2 km); addresses and opening hours are below.

Bulbs are best planted early in the window: late-planted bulbs may flower later or less well. Late planting works only while the soil can be dug. Mulch after planting.

The date is about two weeks before the average daily temperature here falls below 0 °C (ten years of weather): an estimate, not the day the ground freezes, and a cold spell can freeze it earlier. Sources: Iowa State University Extension, Wisconsin Horticulture Extension, UNH Extension, RHS, how the ground freezes (NRC Canada, CBD-26).

Crocus in Petrozavodsk: soil, season and weather

Nights then average below 0 °C in November–April; the coldest, January, averages -10.4 °C.

Planting17 September – 24 October
First autumn frost17 October
Coldest nightsJanuary, -10.4 °C
Soil back at 1 °C in spring23 April
Daylight12:50 on 17 September
Daylight at the winter solstice5:14

The same dates in Petrozavodsk hold for Garlic, Tulip, Daffodil and Hyacinth.

Crocus in Petrozavodsk: depth, winter cold, pests and pets

Plant Dutch crocuses (Crocus vernus) about 12 cm deep and 9 cm apart; smaller species go 7–10 cm deep (RHS).

In Petrozavodsk the average daily temperature stays at 10 °C or lower for about 35 weeks a year (our estimate from ten years of monthly weather). For this bulb Wisconsin Horticulture Extension gives a cold period of 15–17 weeks at about 2–10 °C. The winter here gives that in the ground, so the bulbs need no pre-chilling.

Crocuses multiply on their own (they naturalise); in a lawn, hold off mowing until their leaves die back (RHS).

Birds, squirrels and rodents damage crocuses; planting under metal mesh may reduce losses (RHS). Spring crocus gives dogs and cats vomiting and diarrhoea; do not confuse it with autumn crocus (Colchicum), which is very toxic (Pet Poison Helpline).

Sources: RHS, Wisconsin Horticulture Extension, Pet Poison Helpline.

Crocus in nearby cities

Around Petrozavodsk, Arkhangelsk is 9 days earlier and Saint Petersburg 3 days later.

CityDistanceDateDifference
Saint Petersburg299 km20 September – 10 November3 days later
Cherepovets353 km17 September – 25 Octobersame day
Veliky Novgorod400 km19 September – 10 November2 days later
Vologda415 km10 September – 25 October7 days earlier
Arkhangelsk438 km8 September – 20 October9 days earlier
Helsinki538 km20 September – 25 November3 days later

Where to buy crocus for planting in Petrozavodsk

Planting stock goes into the ground from 17 September to about 24 October; buy it before that. Within 15 km of Petrozavodsk OpenStreetMap lists 8 garden centres and 2 farm shops (collected 27 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Petrozavodsk?

In Petrozavodsk, crocus: plant from 17 September to about 24 October. Bulbs are best planted early in the window: late-planted bulbs may flower later or less well. Late planting works only while the soil can be dug. Mulch after planting.

When is the last spring frost in Petrozavodsk?

Last spring frost around 10 May, first autumn frost around 17 October.

Other crops in Petrozavodsk, with their dates