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When to plant hyacinths in Sofia: 17 October – end of December

In Sofia, hyacinth: plant from 17 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 Sofia: soil, season and weather

Nights then average below 0 °C in December–February; the coldest, January, averages -4.3 °C.

Planting17 October – end of December
First autumn frost16 November
Coldest nightsJanuary, -4.3 °C
Soil back at 1 °C in spring12 January
Daylight11:01 on 17 October
Daylight at the winter solstice9:02

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

Hyacinth in Sofia: 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 Sofia the average daily temperature stays at 10 °C or lower for about 23 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 Sofia, Cluj-Napoca is 7 days earlier and Istanbul 40 days later.

CityDistanceDateDifference
Bucharest295 km20 October – end of December3 days later
Belgrade327 km28 October – end of December11 days later
Cluj-Napoca453 km10 October – end of December7 days earlier
Lecce502 kmby 28 October11 days later
Istanbul505 kmby 26 November40 days later
Izmail530 km25 October – end of December8 days later

Where to buy hyacinth for planting in Sofia

Planting stock goes into the ground from 17 October to the end of December; buy it before that. Within 15 km of Sofia OpenStreetMap lists 13 garden centres, 8 farm-supply shops, 1 plant nursery, 49 markets and 6 farm shops (collected 7 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Sofia?

In Sofia, hyacinth: plant from 17 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 Sofia?

Last spring frost around 12 April, first autumn frost around 16 November.

Other crops in Sofia, with their dates