When to plant crocuses in Letterkenny: 29 October – end of December

In Letterkenny, crocus: plant from 29 October to the end of December. For planting stock, the places nearby include Gary's Petworld and Garden Centre (garden centre, 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.

Crocus in Letterkenny: soil, season and weather

No month averages below 0 °C at night; the coldest nights, in January, average 2.7 °C.

Planting	29 October – end of December
First autumn frost	28 November
Coldest nights	January, 2.7 °C
Soil back at 1 °C in spring	already in the first week of January
Daylight	9:34 on 29 October
Daylight at the winter solstice	7:11

The same dates in Letterkenny hold for Garlic, Tulip, Daffodil and Hyacinth.

Crocus in Letterkenny: depth, winter cold, pests and pets

Plant Dutch crocuses (Crocus vernus) about 12 cm deep and 9 cm apart; smaller species go 7–10 cm deep (RHS).

In Letterkenny the average daily temperature stays at 10 °C or lower for about 28 weeks a year (our estimate from ten years of monthly weather). For this bulb Wisconsin Horticulture Extension gives a cold period of 15–17 weeks at about 2–10 °C. The winter here gives that in the ground, so the bulbs need no pre-chilling.

Crocuses multiply on their own (they naturalise); in a lawn, hold off mowing until their leaves die back (RHS).

Birds, squirrels and rodents damage crocuses; planting under metal mesh may reduce losses (RHS). Spring crocus gives dogs and cats vomiting and diarrhoea; do not confuse it with autumn crocus (Colchicum), which is very toxic (Pet Poison Helpline).

Sources: RHS, Wisconsin Horticulture Extension, Pet Poison Helpline.

Crocus in nearby cities

1 of the nearest cities share Letterkenny's date.

City	Distance	Date	Difference
Sligo	91 km	22 October – end of December	7 days earlier
Belfast	122 km	20 October – end of December	9 days earlier
Dundalk	137 km	21 October – end of December	8 days earlier
Athlone	172 km	27 October – end of December	2 days earlier
Dublin	203 km	25 October – end of December	4 days earlier
Galway	207 km	by 29 October	same day

Where to buy crocus for planting in Letterkenny

Planting stock goes into the ground from 29 October to the end of December; buy it before that. Within 15 km of Letterkenny OpenStreetMap lists 3 garden centres and 1 market (collected 28 October 2026).

Gary's Petworld and Garden Centre — garden centre
Mon–Fri 09:00–18:00 · 2 km
Alcorns — garden centre
2 km · alcorns.ie
Raphoe Garden Centre — garden centre
12 km
Market Square — market
2 km

Questions