When to plant daffodils in Gangneung: 22 October – end of December

In Gangneung, daffodil: plant from 22 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.

Daffodil in Gangneung: soil, season and weather

Nights then average below 0 °C in December–February; the coldest, January, averages -3.1 °C.

Planting	22 October – end of December
First autumn frost	21 November
Coldest nights	January, -3.1 °C
Soil back at 7 °C in spring	13 March
Daylight	11:00 on 22 October
Daylight at the winter solstice	9:33

The same dates in Gangneung hold for Garlic, Tulip, Crocus and Hyacinth.

Daffodil in Gangneung: depth, winter cold, pests and pets

Plant daffodils three times the bulb’s height deep (RHS): about 13–15 cm for large bulbs, 15–20 cm apart (University of Georgia Extension). The RHS advises planting them early in autumn, ideally in September in the UK, so do not leave them late: aim for the start of the window, 22 October.

In Gangneung the average daily temperature stays at 10 °C or lower for about 20 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.

Daffodils are long-lived: clumps slowly expand over the years (RHS). Leave the leaves for at least eight weeks after flowering — they feed next year’s flowers (University of Georgia Extension).

Squirrels avoid daffodils, so they can be planted among tulips to reduce losses (RHS). Daffodils are toxic to dogs, cats and horses; the bulbs are the most poisonous part, and a large amount can cause convulsions and heart rhythm problems (ASPCA).

Sources: RHS, University of Georgia Extension, Wisconsin Horticulture Extension, ASPCA.

Daffodil in nearby cities

1 of the nearest cities share Gangneung's date.

City	Distance	Date	Difference
Chuncheon	103 km	1 October – 22 November	21 days earlier
Seoul	169 km	7 October – 26 November	15 days earlier
Daejeon	205 km	13 October – 5 December	9 days earlier
Daegu	211 km	22 October – end of December	same day
Ulsan	248 km	17 October – end of December	5 days earlier
Jeonju	265 km	18 October – 17 December	4 days earlier

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