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When to plant hyacinths in Radom: 16 October – 24 December

In Radom, hyacinth: plant from 16 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.

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).

Hyacinth in Radom: soil, season and weather

Nights then average below 0 °C in December–March; the coldest, January, averages -3.1 °C.

Planting16 October – 24 December
First autumn frost15 November
Coldest nightsJanuary, -3.1 °C
Soil back at 1 °C in springalready in the first week of January
Daylight10:42 on 16 October
Daylight at the winter solstice7:51

The same dates in Radom hold for Garlic, Tulip, Daffodil and Crocus.

Hyacinth in Radom: 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 Radom the average daily temperature stays at 10 °C or lower for about 27 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 Radom, Kraków is 14 days earlier and Warsaw 2 days later.

CityDistanceDateDifference
Warsaw93 km18 October – 27 December2 days later
Łódź123 km5 October – 22 December11 days earlier
Częstochowa156 km11 October – 19 December5 days earlier
Rzeszów163 km16 October – 20 Decembersame day
Kraków172 km2 October – 28 December14 days earlier
Brest191 km14 October – 12 December2 days earlier

Where to buy hyacinth for planting in Radom

Planting stock goes into the ground from 16 October to about 24 December; buy it before that. Within 15 km of Radom OpenStreetMap lists 11 garden centres, 13 plant nurseries and 6 markets (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Radom?

In Radom, hyacinth: plant from 16 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 Radom?

Last spring frost around 20 April, first autumn frost around 15 November.

Other crops in Radom, with their dates