When to plant crocuses in Ulan-Ude: 30 August – 7 October

In Ulan-Ude, crocus: plant from 30 August to about 7 October. For planting stock, the places nearby include Сагаан Дали (farm shop, 6 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).

Crocus in Ulan-Ude: soil, season and weather

Nights then average below 0 °C in October–April; the coldest, January, averages -25.4 °C.

Planting	30 August – 7 October
First autumn frost	29 September
Coldest nights	January, -25.4 °C
Soil back at 1 °C in spring	5 April
Daylight	13:45 on 30 August
Daylight at the winter solstice	7:46

The same dates in Ulan-Ude hold for Garlic, Tulip, Daffodil and Hyacinth.

Crocus in Ulan-Ude: 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 Ulan-Ude the average daily temperature stays at 10 °C or lower for about 33 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 Ulan-Ude, Chita is 6 days earlier and Blagoveshchensk 4 days later.

City	Distance	Date	Difference
Irkutsk	231 km	31 August – 8 October	1 day later
Chita	404 km	24 August – 3 October	6 days earlier
Krasnoyarsk	1,069 km	28 August – 7 October	2 days earlier
Novokuznetsk	1,387 km	31 August – 10 October	1 day later
Blagoveshchensk	1,399 km	3 September – 9 October	4 days later
Kemerovo	1,465 km	27 August – 8 October	3 days earlier

Where to buy crocus for planting in Ulan-Ude

Planting stock goes into the ground from 30 August to about 7 October; buy it before that. Within 15 km of Ulan-Ude OpenStreetMap lists 1 garden centre and 1 farm shop (collected 27 October 2026).

Сагаан Дали — farm shop
Зеленоградская улица 3А · 6 km
Семена — garden centre
11 km

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