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

In Sendai, hyacinth: plant from 24 October to the end of December. For planting stock, the places nearby include marché lien (farm shop, 12 km) and Greenhouse Miyama (garden centre, 12 km); addresses and opening hours are below.

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 Sendai: soil, season and weather

Nights then average below 0 °C in December–February; the coldest, January, averages -2.7 °C.

Planting24 October – end of December
First autumn frost23 November
Coldest nightsJanuary, -2.7 °C
Soil back at 1 °C in springalready in the first week of January
Daylight10:54 on 24 October
Daylight at the winter solstice9:30

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

Hyacinth in Sendai: 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 Sendai the average daily temperature stays at 10 °C or lower for about 22 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 Sendai, Sapporo is 37 days earlier and Niigata 27 days later.

CityDistanceDateDifference
Niigata165 km20 November – end of December27 days later
Tokyo305 km14 November – end of December21 days later
Hamamatsu485 kmby 18 November25 days later
Nagoya493 km10 November – end of December17 days later
Sapporo534 km17 September – 31 October37 days earlier
Kyoto582 km7 November – end of December14 days later

Where to buy hyacinth for planting in Sendai

Planting stock goes into the ground from 24 October to the end of December; buy it before that. Within 15 km of Sendai OpenStreetMap lists 2 garden centres, 1 farm-supply shop, 4 markets and 2 farm shops (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Sendai?

In Sendai, 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 Sendai?

Last spring frost around 31 March, first autumn frost around 23 November.

Other crops in Sendai, with their dates