Greenly Garden
Get the app
EN

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

In Nagoya, hyacinth: 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.

Hyacinth 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 Crocus.

Hyacinth in Nagoya: 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 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 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 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 hyacinth 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 hyacinths in Nagoya?

In Nagoya, hyacinth: 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