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When to plant hyacinths in Gwangju: 24 October – end of December

In Gwangju, hyacinth: plant from 24 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.

Hyacinth in Gwangju: soil, season and weather

Nights then average below 0 °C in December–February; the coldest, January, averages -3.3 °C.

Planting24 October – end of December
First autumn frost23 November
Coldest nightsJanuary, -3.3 °C
Soil back at 1 °C in springalready in the first week of January
Daylight11:02 on 24 October
Daylight at the winter solstice9:47

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

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

Plant hyacinths 10 cm deep, at least 7.5 cm apart (RHS). In the ground hyacinths are fully hardy, but in containers they can be frost tender in cold winters (RHS); here winter nights average below 0 °C, so wrap the pots or move them to a sheltered spot.

In Gwangju 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 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 Gwangju, Daejeon is 11 days earlier and Jeju City 26 days later.

CityDistanceDateDifference
Jeonju77 km18 October – 17 December6 days earlier
Daejeon140 km13 October – 5 December11 days earlier
Daegu176 km22 October – end of December2 days earlier
Jeju City187 kmby 19 November26 days later
Busan202 km23 October – end of December1 day earlier
Ulsan228 km17 October – end of December7 days earlier

Where to buy hyacinth for planting in Gwangju

Planting stock goes into the ground from 24 October to the end of December; buy it before that. Within 15 km of Gwangju OpenStreetMap lists 1 garden centre, 14 markets and 1 farm shop (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Gwangju?

In Gwangju, hyacinth: plant from 24 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 Gwangju?

Last spring frost around 1 April, first autumn frost around 23 November.

Other crops in Gwangju, with their dates