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When to plant crocuses in Mulhouse: 18 October – end of December

In Mulhouse, crocus: plant from 18 October to the end of December. For planting stock, the places nearby include La Ferme du Château (farm shop, 3 km) and Walliser (garden centre, 5 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 Mulhouse: soil, season and weather

Nights then average below 0 °C in January; the coldest, January, averages -0.4 °C.

Planting18 October – end of December
First autumn frost17 November
Coldest nightsJanuary, -0.4 °C
Soil back at 1 °C in springalready in the first week of January
Daylight10:45 on 18 October
Daylight at the winter solstice8:24

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

Crocus in Mulhouse: 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 Mulhouse the average daily temperature stays at 10 °C or lower for about 24 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 Mulhouse, Lucerne is 28 days earlier and Neuchâtel 11 days later.

CityDistanceDateDifference
Bern89 km4 October – 21 December14 days earlier
Neuchâtel90 km29 October – end of December11 days later
Strasbourg96 km21 October – end of December3 days later
Zurich100 km17 October – end of December1 day earlier
Fribourg107 km7 October – 30 December11 days earlier
Lucerne107 km20 September – 29 November28 days earlier

Where to buy crocus for planting in Mulhouse

Planting stock goes into the ground from 18 October to the end of December; buy it before that. Within 15 km of Mulhouse OpenStreetMap lists 12 garden centres, 2 markets and 7 farm shops (collected 27 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Mulhouse?

In Mulhouse, crocus: plant from 18 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 Mulhouse?

Last spring frost around 6 April, first autumn frost around 17 November.

Other crops in Mulhouse, with their dates