Greenly Garden
Get the app
EN

When to plant tulips in Ulsan: 17 October – end of December

In Ulsan, tulip: plant from 17 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.

Tulip in Ulsan: soil, season and weather

Nights then average below 0 °C in December–February; the coldest, January, averages -3.5 °C.

Planting17 October – end of December
First autumn frost16 November
Coldest nightsJanuary, -3.5 °C
Soil back at 7 °C in spring4 March
Daylight11:16 on 17 October
Daylight at the winter solstice9:45

The same dates in Ulsan hold for Garlic, Daffodil, Crocus and Hyacinth.

Tulip in Ulsan: depth, winter cold, pests and pets

Plant tulips at a depth of two to three times the bulb’s height, at least twice the bulb’s width apart, pointed end up (RHS).

In Ulsan the average daily temperature stays at 10 °C or lower for about 19 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.

Border tulips often fail to flower in their second year if left in the ground, so many gardeners grow them for one spring and plant fresh bulbs each autumn; Darwin hybrid and Kaufmanniana tulips reflower more reliably (RHS). Soils that stay wet in summer make reflowering difficult (RHS): in Ulsan the three warmest months bring about 750 mm of rain together.

Grey squirrels often dig up tulip bulbs: lay chicken wire over the bed until the leaves appear, or plant daffodils among them, which squirrels avoid (RHS). Tulips are toxic to dogs, cats and horses, the bulb most of all (ASPCA).

Sources: RHS, Wisconsin Horticulture Extension, ASPCA.

Tulip in nearby cities

Around Ulsan, Daejeon is 4 days earlier and Fukuoka 35 days later.

CityDistanceDateDifference
Busan47 km23 October – end of December6 days later
Daegu74 km22 October – end of December5 days later
Daejeon195 km13 October – 5 December4 days earlier
Jeonju198 km18 October – 17 December1 day later
Gwangju228 km24 October – end of December7 days later
Fukuoka239 kmby 21 November35 days later

Where to buy tulip for planting in Ulsan

Planting stock goes into the ground from 17 October to the end of December; buy it before that. Within 15 km of Ulsan OpenStreetMap lists 1 garden centre, 8 markets and 1 farm shop (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant tulips in Ulsan?

In Ulsan, tulip: plant from 17 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 Ulsan?

Last spring frost around 22 March, first autumn frost around 16 November.

Other crops in Ulsan, with their dates