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When to plant hyacinths in Kostanay: 2 September – 17 October

In Kostanay, hyacinth: plant from 2 September to about 17 October. For planting stock, the places nearby include Астана (farm shop, 1 km) and Invent.kz (garden centre, 3 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 date is about two weeks before the average daily temperature here falls below 0 °C (ten years of weather): an estimate, not the day the ground freezes, and a cold spell can freeze it earlier. Sources: Iowa State University Extension, Wisconsin Horticulture Extension, UNH Extension, RHS, how the ground freezes (NRC Canada, CBD-26).

Hyacinth in Kostanay: soil, season and weather

Nights then average below 0 °C in November–March; the coldest, January, averages -17.4 °C.

Planting2 September – 17 October
First autumn frost2 October
Coldest nightsJanuary, -17.4 °C
Soil back at 1 °C in spring10 April
Daylight13:38 on 2 September
Daylight at the winter solstice7:31

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

Hyacinth in Kostanay: 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 Kostanay the average daily temperature stays at 10 °C or lower for about 31 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 Kostanay, Magnitogorsk is 6 days earlier and Chelyabinsk 2 days later.

CityDistanceDateDifference
Chelyabinsk261 km4 September – 16 October2 days later
Kurgan273 km1 September – 15 October1 day earlier
Magnitogorsk307 km27 August – 15 October6 days earlier
Kokshetau384 km30 August – 15 October3 days earlier
Petropavl405 km30 August – 14 October3 days earlier
Yekaterinburg447 km29 August – 13 October4 days earlier

Where to buy hyacinth for planting in Kostanay

Planting stock goes into the ground from 2 September to about 17 October; buy it before that. Within 15 km of Kostanay OpenStreetMap lists 3 garden centres, 10 markets and 1 farm shop (collected 27 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Kostanay?

In Kostanay, hyacinth: plant from 2 September to about 17 October. 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 Kostanay?

Last spring frost around 4 May, first autumn frost around 2 October.

Other crops in Kostanay, with their dates