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When to plant crocuses in San Luis: by 24 May

In San Luis, crocus: plant by 24 May. The winter here is too mild for our late-planting rule, so we give no later limit.

Crocus in San Luis: soil, season and weather

No month averages below 0 °C at night; the coldest nights, in July, average 4.7 °C.

Plantingby 24 May
First autumn frost23 June
Coldest nightsJuly, 4.7 °C
Soil back at 1 °C in springalready in the first week of July
Daylight10:14 on 24 May
Daylight at the winter solstice9:57

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

Crocus in San Luis: 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 San Luis the average daily temperature stays at 10 °C or lower for about 5 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. That is less than the bulbs need, and without more cold they may not flower properly. The cold can also be given in a refrigerator at about 2–7 °C, as Wisconsin Horticulture Extension does for crocuses forced in pots.

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

All the nearest cities on our list plant crocus earlier than San Luis; the closest date is in San Juan, 3 days earlier.

CityDistanceDateDifference
San Rafael238 kmby 6 May18 days earlier
Mendoza238 kmby 18 May6 days earlier
San Juan284 kmby 21 May3 days earlier
Santa Rosa414 kmby 14 May10 days earlier
Rancagua420 kmby 13 May11 days earlier
Curicó491 kmby 8 May16 days earlier

Where to buy crocus for planting in San Luis

Planting stock goes into the ground by 24 May; buy it before that. Within 15 km of San Luis OpenStreetMap lists 1 plant nursery (collected 27 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in San Luis?

In San Luis, crocus: plant by 24 May. The winter here is too mild for our late-planting rule, so we give no later limit.

When is the last spring frost in San Luis?

Last spring frost around 21 August, first autumn frost around 23 June.

Other crops in San Luis, with their dates