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When to plant crocuses in Santa Rosa: by 14 May

In Santa Rosa, crocus: plant by 14 May. The winter here is too mild for our late-planting rule, so we give no later limit. For planting stock, the places nearby include Vivero Forestal Provincial Santa Rosa (plant nursery, 3 km) and YPF Agro (farm supply, 5 km); addresses and opening hours are below.

Crocus in Santa Rosa: soil, season and weather

No month averages below 0 °C at night; the coldest nights, in July, average 3.9 °C.

Plantingby 14 May
First autumn frost13 June
Coldest nightsJuly, 3.9 °C
Soil back at 1 °C in springalready in the first week of July
Daylight10:13 on 14 May
Daylight at the winter solstice9:39

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

Crocus in Santa Rosa: 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 Santa Rosa the average daily temperature stays at 10 °C or lower for about 8 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

Around Santa Rosa, San Rafael is 8 days earlier and San Luis 10 days later.

CityDistanceDateDifference
Bahía Blanca293 kmby 16 May2 days later
San Luis414 kmby 24 May10 days later
Neuquén421 kmby 10 May4 days earlier
San Rafael428 kmby 6 May8 days earlier
Mendoza586 kmby 18 May4 days later
Rancagua645 kmby 13 May1 day earlier

Where to buy crocus for planting in Santa Rosa

Planting stock goes into the ground by 14 May; buy it before that. Within 15 km of Santa Rosa OpenStreetMap lists 2 garden centres, 4 farm-supply shops, 2 plant nurseries and 1 market (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Santa Rosa?

In Santa Rosa, crocus: plant by 14 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 Santa Rosa?

Last spring frost around 25 August, first autumn frost around 13 June.

Other crops in Santa Rosa, with their dates