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When to plant crocuses in Busan: 23 October – end of December

In Busan, crocus: plant from 23 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.

Crocus in Busan: soil, season and weather

Nights then average below 0 °C in December–February; the coldest, January, averages -2.8 °C.

Planting23 October – end of December
First autumn frost22 November
Coldest nightsJanuary, -2.8 °C
Soil back at 1 °C in springalready in the first week of January
Daylight11:04 on 23 October
Daylight at the winter solstice9:47

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

Crocus in Busan: 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 Busan the average daily temperature stays at 10 °C or lower for about 18 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

Around Busan, Daejeon is 10 days earlier and Fukuoka 29 days later.

CityDistanceDateDifference
Ulsan47 km17 October – end of December6 days earlier
Daegu88 km22 October – end of December1 day earlier
Jeonju188 km18 October – 17 December5 days earlier
Daejeon200 km13 October – 5 December10 days earlier
Gwangju202 km24 October – end of December1 day later
Fukuoka215 kmby 21 November29 days later

Where to buy crocus for planting in Busan

Planting stock goes into the ground from 23 October to the end of December; buy it before that. Within 15 km of Busan OpenStreetMap lists 27 markets (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Busan?

In Busan, crocus: plant from 23 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 Busan?

Last spring frost around 19 March, first autumn frost around 22 November.

Other crops in Busan, with their dates