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When to plant hyacinths in Cluj-Napoca: 10 October – end of December

In Cluj-Napoca, 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 falls below 0 °C only in January; the sources go no later than December. Sources: Iowa State University Extension, Wisconsin Horticulture Extension, UNH Extension, RHS, how the ground freezes (NRC Canada, CBD-26).

Hyacinth in Cluj-Napoca: soil, season and weather

Nights then average below 0 °C in December–February; the coldest, January, averages -3.6 °C.

Planting10 October – end of December
First autumn frost9 November
Coldest nightsJanuary, -3.6 °C
Soil back at 1 °C in spring8 January
Daylight11:14 on 10 October
Daylight at the winter solstice8:32

The same dates in Cluj-Napoca hold for Garlic, Tulip, Daffodil and Crocus.

Hyacinth in Cluj-Napoca: 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 Cluj-Napoca the average daily temperature stays at 10 °C or lower for about 25 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 Cluj-Napoca, Ivano-Frankivsk is 20 days earlier and Bucharest 10 days later.

CityDistanceDateDifference
Mukachevo197 km23 September – 11 December17 days earlier
Uzhhorod227 km1 October – 27 December9 days earlier
Chernivtsi245 km21 September – 18 December19 days earlier
Ivano-Frankivsk253 km20 September – 16 December20 days earlier
Drohobych287 km21 September – 7 December19 days earlier
Bucharest326 km20 October – end of December10 days later

Where to buy hyacinth for planting in Cluj-Napoca

Planting stock goes into the ground from 10 October to the end of December; buy it before that. Within 15 km of Cluj-Napoca OpenStreetMap lists 4 garden centres, 2 farm-supply shops, 1 plant nursery, 13 markets and 2 farm shops (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Cluj-Napoca?

In Cluj-Napoca, 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 Cluj-Napoca?

Last spring frost around 17 April, first autumn frost around 9 November.

Other crops in Cluj-Napoca, with their dates