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When to plant crocuses in Ostrava: 10 October – end of December

In Ostrava, crocus: plant from 10 October to the end of December. For planting stock, the places nearby include Zahradnictví Havlina (garden centre, 7 km) and Zahradní centrum Vykrut (garden centre, 10 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 Ostrava: soil, season and weather

Nights then average below 0 °C in December–February; the coldest, January, averages -2.5 °C.

Planting10 October – end of December
First autumn frost9 November
Coldest nightsJanuary, -2.5 °C
Soil back at 1 °C in spring9 January
Daylight11:08 on 10 October
Daylight at the winter solstice8:06

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

Crocus in Ostrava: 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 Ostrava 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 Ostrava, Kraków is 8 days earlier and Opole 9 days later.

CityDistanceDateDifference
Katowice73 km17 October – 22 December7 days later
Opole97 km19 October – end of December9 days later
Kraków123 km2 October – 28 December8 days earlier
Częstochowa126 km11 October – 19 December1 day later
Brno138 km7 October – 24 December3 days earlier
Wrocław167 km12 October – end of December2 days later

Where to buy crocus for planting in Ostrava

Planting stock goes into the ground from 10 October to the end of December; buy it before that. Within 15 km of Ostrava OpenStreetMap lists 10 garden centres, 1 farm-supply shop, 3 markets and 1 farm shop (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Ostrava?

In Ostrava, crocus: plant from 10 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 Ostrava?

Last spring frost around 19 April, first autumn frost around 9 November.

Other crops in Ostrava, with their dates