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When to plant hyacinths in San Sebastián: by 3 November

In San Sebastián, hyacinth: plant by 3 November. The winter here is too mild for our late-planting rule, so we give no later limit. For planting stock, the places nearby include Loraldi (garden centre, 6 km) and Endanea Garden Center (garden centre, 13 km); addresses and opening hours are below.

Hyacinth in San Sebastián: soil, season and weather

No month averages below 0 °C at night; the coldest nights, in January, average 5 °C.

Plantingby 3 November
First autumn frost3 December
Coldest nightsJanuary, 5 °C
Soil back at 1 °C in springalready in the first week of January
Daylight10:13 on 3 November
Daylight at the winter solstice8:58

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

Hyacinth in San Sebastián: depth, winter cold, pests and pets

Plant hyacinths 10 cm deep, at least 7.5 cm apart (RHS).

In San Sebastián the average daily temperature stays at 10 °C or lower for about 11 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. That is less than the bulbs need, and without more cold they may not flower properly. Where winters are not cold enough for long enough, LSU AgCenter keeps tulip and hyacinth bulbs in the refrigerator for at least six to eight weeks before planting, and plants them only once the soil has cooled: warm soil can cancel the chilling. Keep fruit out of that refrigerator — ripening fruit gives off ethylene, which harms the flowers (Wisconsin Horticulture Extension).

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, LSU AgCenter, ASPCA.

Hyacinth in nearby cities

Around San Sebastián, Vitoria-Gasteiz is 9 days earlier and Bilbao 23 days later.

CityDistanceDateDifference
Bayonne45 kmby 17 November14 days later
Pamplona63 km31 October – end of December3 days earlier
Vitoria-Gasteiz77 km25 October – end of December9 days earlier
Bilbao77 kmby 26 November23 days later
Logroño102 kmby 4 November1 day later
Pau131 kmby 4 November1 day later

Where to buy hyacinth for planting in San Sebastián

Planting stock goes into the ground by 3 November; buy it before that. Within 15 km of San Sebastián OpenStreetMap lists 4 garden centres, 3 farm-supply shops, 6 markets and 4 farm shops (collected 27 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in San Sebastián?

In San Sebastián, hyacinth: plant by 3 November. The winter here is too mild for our late-planting rule, so we give no later limit.

When is the last spring frost in San Sebastián?

Last spring frost around 22 January, first autumn frost around 3 December.

Other crops in San Sebastián, with their dates