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When to plant hyacinths in Swansea: by 1 November

In Swansea, hyacinth: plant by 1 November. The winter here is too mild for our late-planting rule, so we give no later limit.

Hyacinth in Swansea: soil, season and weather

No month averages below 0 °C at night; the coldest nights, in January, average 3.7 °C.

Plantingby 1 November
First autumn frost1 December
Coldest nightsJanuary, 3.7 °C
Soil back at 1 °C in springalready in the first week of January
Daylight9:41 on 1 November
Daylight at the winter solstice7:49

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

Hyacinth in Swansea: depth, winter cold, pests and pets

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

In Swansea the average daily temperature stays at 10 °C or lower for about 24 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 earlier than Swansea; the closest date is in Exeter, 4 days earlier.

CityDistanceDateDifference
Bristol95 km23 October – end of December9 days earlier
Exeter104 km28 October – end of December4 days earlier
Birmingham170 km20 October – end of December12 days earlier
Coventry188 km18 October – end of December14 days earlier
Stoke-on-Trent197 km16 October – end of December16 days earlier
Liverpool209 km27 October – end of December5 days earlier

Where to buy hyacinth for planting in Swansea

Planting stock goes into the ground by 1 November; buy it before that. Within 15 km of Swansea OpenStreetMap lists 1 garden centre, 2 markets and 1 farm shop (collected 20 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Swansea?

In Swansea, hyacinth: plant by 1 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 Swansea?

Last spring frost around 28 February, first autumn frost around 1 December.

Other crops in Swansea, with their dates