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When to plant crocuses in Brno: 7 October – 24 December

In Brno, crocus: plant from 7 October to about 24 December. For planting stock, the places nearby include Poctivé potraviny (farm shop, 3 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 Brno: soil, season and weather

Nights then average below 0 °C in December–February; the coldest, January, averages -3.4 °C.

Planting7 October – 24 December
First autumn frost6 November
Coldest nightsJanuary, -3.4 °C
Soil back at 1 °C in spring11 January
Daylight11:20 on 7 October
Daylight at the winter solstice8:12

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

Crocus in Brno: 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 Brno 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

1 of the nearest cities share Brno's date.

CityDistanceDateDifference
Pardubice111 km11 October – end of December4 days later
Vienna111 km13 October – 29 December6 days later
Bratislava122 km17 October – end of December10 days later
Ostrava138 km10 October – end of December3 days later
České Budějovice158 km7 October – end of Decembersame day
Prague184 km9 October – end of December2 days later

Where to buy crocus for planting in Brno

Planting stock goes into the ground from 7 October to about 24 December; buy it before that. Within 15 km of Brno OpenStreetMap lists 15 garden centres, 3 farm-supply shops, 1 plant nursery, 6 markets and 7 farm shops (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Brno?

In Brno, crocus: plant from 7 October to about 24 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 Brno?

Last spring frost around 24 April, first autumn frost around 6 November.

Other crops in Brno, with their dates