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When to plant crocuses in Copenhagen: 20 October – end of December

In Copenhagen, crocus: plant from 20 October to the end of December. For planting stock, the places nearby include Københavns Fødevarefællesskab (farm shop, 1 km) and TagTomat (farm supply, 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 Copenhagen: soil, season and weather

Nights then average below 0 °C in January; the coldest, January, averages -0.2 °C.

Planting20 October – end of December
First autumn frost19 November
Coldest nightsJanuary, -0.2 °C
Soil back at 1 °C in springalready in the first week of January
Daylight10:10 on 20 October
Daylight at the winter solstice7:01

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

Crocus in Copenhagen: 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 Copenhagen the average daily temperature stays at 10 °C or lower for about 28 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 Copenhagen, Rostock is 2 days earlier and Potsdam 2 days later.

CityDistanceDateDifference
Rostock179 km18 October – end of December2 days earlier
Kiel217 km21 October – end of December1 day later
Szczecin281 km18 October – end of December2 days earlier
Hamburg289 km20 October – end of Decembersame day
Berlin356 km20 October – end of Decembersame day
Potsdam366 km22 October – end of December2 days later

Where to buy crocus for planting in Copenhagen

Planting stock goes into the ground from 20 October to the end of December; buy it before that. Within 15 km of Copenhagen OpenStreetMap lists 9 garden centres, 2 farm-supply shops, 3 plant nurseries, 7 markets and 7 farm shops (collected 7 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Copenhagen?

In Copenhagen, crocus: plant from 20 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 Copenhagen?

Last spring frost around 19 April, first autumn frost around 19 November.

Other crops in Copenhagen, with their dates