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When to plant hyacinths in Dundalk: 21 October – end of December

In Dundalk, hyacinth: plant from 21 October to the end of December. For planting stock, the places nearby include Hardys (farm supply, 2 km); addresses and opening hours are below.

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 Dundalk: soil, season and weather

No month averages below 0 °C at night; the coldest nights, in January, average 2.5 °C.

Planting21 October – end of December
First autumn frost20 November
Coldest nightsJanuary, 2.5 °C
Soil back at 1 °C in springalready in the first week of January
Daylight10:13 on 21 October
Daylight at the winter solstice7:22

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

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

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

In Dundalk the average daily temperature stays at 10 °C or lower for about 27 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 Dundalk, Belfast is 1 day earlier and Letterkenny 8 days later.

CityDistanceDateDifference
Dublin73 km25 October – end of December4 days later
Belfast73 km20 October – end of December1 day earlier
Athlone120 km27 October – end of December6 days later
Letterkenny137 km29 October – end of December8 days later
Sligo138 km22 October – end of December1 day later
Galway193 kmby 29 October8 days later

Where to buy hyacinth for planting in Dundalk

Planting stock goes into the ground from 21 October to the end of December; buy it before that. Within 15 km of Dundalk OpenStreetMap lists 2 garden centres, 2 farm-supply shops and 2 farm shops (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Dundalk?

In Dundalk, hyacinth: plant from 21 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 Dundalk?

Last spring frost around 20 March, first autumn frost around 20 November.

Other crops in Dundalk, with their dates