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When to plant crocuses in Poznań: 17 October – end of December

In Poznań, crocus: plant from 17 October to the end of December. For planting stock, the places nearby include Giełda kwiatowa (garden centre, 2 km) and Ogród Zawady 19 (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 average daily temperature here stays above 0 °C all winter, and at least three months average 7 °C or less: our rule of thumb for the winter cold spring bulbs need. Sources: Iowa State University Extension, Wisconsin Horticulture Extension, UNH Extension, RHS.

Crocus in Poznań: soil, season and weather

Nights then average below 0 °C in December–February; the coldest, January, averages -1.8 °C.

Planting17 October – end of December
First autumn frost16 November
Coldest nightsJanuary, -1.8 °C
Soil back at 1 °C in springalready in the first week of January
Daylight10:35 on 17 October
Daylight at the winter solstice7:40

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

Crocus in Poznań: 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 Poznań the average daily temperature stays at 10 °C or lower for about 26 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 Poznań, Łódź is 12 days earlier and Opole 2 days later.

CityDistanceDateDifference
Bydgoszcz107 km13 October – end of December4 days earlier
Zielona Góra110 km14 October – end of December3 days earlier
Wrocław145 km12 October – end of December5 days earlier
Łódź187 km5 October – 22 December12 days earlier
Szczecin196 km18 October – end of December1 day later
Opole205 km19 October – end of December2 days later

Where to buy crocus for planting in Poznań

Planting stock goes into the ground from 17 October to the end of December; buy it before that. Within 15 km of Poznań OpenStreetMap lists 39 garden centres, 2 farm-supply shops, 2 plant nurseries, 16 markets and 7 farm shops (collected 7 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Poznań?

In Poznań, crocus: plant from 17 October to the end of December. 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 Poznań?

Last spring frost around 21 April, first autumn frost around 16 November.

Other crops in Poznań, with their dates