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When to plant crocuses in Cheyenne: 13 September – 4 December

In Cheyenne, crocus: plant from 13 September to about 4 December. For planting stock, the places nearby include WY fresh (farm shop, 3 km) and River Bend Nursery and Stone (garden centre, 7 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 Cheyenne: soil, season and weather

Nights then average below 0 °C in November–April; the coldest, February, averages -6.8 °C.

Planting13 September – 4 December
First autumn frost13 October
Coldest nightsFebruary, -6.8 °C
Soil back at 1 °C in spring16 January
Daylight12:36 on 13 September
Daylight at the winter solstice9:12

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

Crocus in Cheyenne: 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 Cheyenne the average daily temperature stays at 10 °C or lower for about 29 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 Cheyenne, Rapid City is 1 day earlier and Pueblo 15 days later.

CityDistanceDateDifference
Fort Collins69 km21 September – 5 December8 days later
Denver156 km15 September – 14 December2 days later
Pueblo321 km28 September – end of December15 days later
Rapid City351 km12 September – 28 November1 day earlier
Grand Junction392 km27 September – 7 December14 days later
Pierre514 km24 September – 19 November11 days later

Where to buy crocus for planting in Cheyenne

Planting stock goes into the ground from 13 September to about 4 December; buy it before that. Within 15 km of Cheyenne OpenStreetMap lists 3 garden centres and 1 farm shop (collected 20 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Cheyenne?

In Cheyenne, crocus: plant from 13 September to about 4 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 Cheyenne?

Last spring frost around 12 May, first autumn frost around 13 October.

Other crops in Cheyenne, with their dates