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When to plant daffodils in Hiroshima: 26 October – end of December

In Hiroshima, daffodil: plant from 26 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 Hiroshima: soil, season and weather

Nights then average below 0 °C in January, February; the coldest, January, averages -1.8 °C.

Planting26 October – end of December
First autumn frost25 November
Coldest nightsJanuary, -1.8 °C
Soil back at 7 °C in spring13 March
Daylight10:59 on 26 October
Daylight at the winter solstice9:51

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

Daffodil in Hiroshima: 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, 26 October.

In Hiroshima 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

Around Hiroshima, Ulsan is 9 days earlier and Fukuoka 26 days later.

CityDistanceDateDifference
Okayama138 km15 November – end of December20 days later
Fukuoka209 kmby 21 November26 days later
Kumamoto239 kmby 3 November8 days later
Osaka281 km17 November – end of December22 days later
Kyoto311 km7 November – end of December12 days later
Ulsan313 km17 October – end of December9 days earlier

Where to buy daffodil for planting in Hiroshima

Planting stock goes into the ground from 26 October to the end of December; buy it before that. Within 15 km of Hiroshima OpenStreetMap lists 2 garden centres, 2 farm-supply shops, 3 markets and 2 farm shops (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant daffodils in Hiroshima?

In Hiroshima, daffodil: plant from 26 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 Hiroshima?

Last spring frost around 9 April, first autumn frost around 25 November.

Other crops in Hiroshima, with their dates