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

In Ostrava, hyacinth: 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.

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.

Hyacinth 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 Crocus.

Hyacinth in Ostrava: depth, winter cold, pests and pets

Plant hyacinths 10 cm deep, at least 7.5 cm apart (RHS). In the ground hyacinths are fully hardy, but in containers they can be frost tender in cold winters (RHS); here winter nights average below 0 °C, so wrap the pots or move them to a sheltered spot.

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 12–15 weeks at about 2–10 °C. The winter here gives that in the ground, so the bulbs need no pre-chilling.

Flowers get smaller in the years after planting: for full spikes, replace the bulbs or add a few new ones each autumn (RHS).

If squirrels are a problem, protect the bulbs with wire mesh (RHS). Hyacinths are toxic to dogs, cats and horses: intense vomiting and diarrhoea (ASPCA).

Sources: RHS, Wisconsin Horticulture Extension, ASPCA.

Hyacinth 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 hyacinth 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 hyacinths in Ostrava?

In Ostrava, hyacinth: 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