When to plant crocuses in Ushuaia: 27 December – 18 May

In Ushuaia, crocus: plant from 27 December to about 18 May.

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 Ushuaia: soil, season and weather

Nights then average below 0 °C in May–September; the coldest, July, averages -4.1 °C.

Planting	27 December – 18 May
First autumn frost	26 January
Coldest nights	July, -4.1 °C
Soil back at 1 °C in spring	28 September
Daylight	17:18 on 27 December
Daylight at the winter solstice	7:12

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

Crocus in Ushuaia: 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 Ushuaia the average daily temperature stays at 10 °C or lower for about 52 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 Ushuaia, Coyhaique is 12 days earlier and Puerto Montt 131 days later.

City	Distance	Date	Difference
Punta Arenas	250 km	8 March – end of June	71 days later
Río Gallegos	360 km	7 March – end of June	70 days later
Comodoro Rivadavia	997 km	by 24 April	118 days later
Coyhaique	1,061 km	15 December – 25 May	12 days earlier
Trelew	1,304 km	by 29 April	123 days later
Puerto Montt	1,522 km	by 7 May	131 days later

Where to buy crocus for planting in Ushuaia

Planting stock goes into the ground from 27 December to about 18 May; buy it before that. Within 15 km of Ushuaia OpenStreetMap lists 3 markets (collected 27 October 2026).

Mar de Cobos — market
2 km
Champita — market
2 km
Mercado De la Costa — market
6 km

Questions