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When to plant crocuses in Nagoya: 10 November – end of December

In Nagoya, crocus: plant from 10 November 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 Nagoya: soil, season and weather

Nights then average below 0 °C in January; the coldest, January, averages -0.5 °C.

Planting10 November – end of December
First autumn frost10 December
Coldest nightsJanuary, -0.5 °C
Soil back at 1 °C in springalready in the first week of January
Daylight10:29 on 10 November
Daylight at the winter solstice9:47

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

Crocus in Nagoya: 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 Nagoya the average daily temperature stays at 10 °C or lower for about 16 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 Nagoya, Kyoto is 3 days earlier and Niigata 10 days later.

CityDistanceDateDifference
Hamamatsu92 kmby 18 November8 days later
Kyoto105 km7 November – end of December3 days earlier
Osaka139 km17 November – end of December7 days later
Tokyo259 km14 November – end of December4 days later
Okayama278 km15 November – end of December5 days later
Niigata360 km20 November – end of December10 days later

Where to buy crocus for planting in Nagoya

Planting stock goes into the ground from 10 November to the end of December; buy it before that. Within 15 km of Nagoya OpenStreetMap lists 7 garden centres, 8 markets and 1 farm shop (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Nagoya?

In Nagoya, crocus: plant from 10 November 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 Nagoya?

Last spring frost around 22 March, first autumn frost around 10 December.

Other crops in Nagoya, with their dates