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

In Soria, 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 Soria: soil, season and weather

Nights then average below 0 °C in January, February; the coldest, January, averages -0.8 °C.

Planting	10 October – end of December
First autumn frost	9 November
Coldest nights	January, -0.8 °C
Soil back at 1 °C in spring	already in the first week of January
Daylight	11:22 on 10 October
Daylight at the winter solstice	9:08

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

Hyacinth in Soria: 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 Soria 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

All the nearest cities on our list plant hyacinth later than Soria; the closest date is in Aranda de Duero, 4 days later.

City	Distance	Date	Difference
Logroño	79 km	by 4 November	25 days later
Tudela	79 km	by 7 November	28 days later
Aranda de Duero	102 km	14 October – end of December	4 days later
Burgos	120 km	18 October – end of December	8 days later
Vitoria-Gasteiz	122 km	25 October – end of December	15 days later
Zaragoza	132 km	by 20 November	41 days later

Where to buy hyacinth for planting in Soria

Planting stock goes into the ground from 10 October to the end of December; buy it before that. Within 15 km of Soria OpenStreetMap lists 2 plant nurseries and 1 market (collected 27 October 2026).

Mercado Municipal — market
1 km
Viveros Ibáñez — plant nursery
5 km · viverosibanez.es
Vivero Forestal — plant nursery
8 km

Questions