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When to plant crocuses in Porto: by 19 November

In Porto, crocus: plant by 19 November. The winter here is too mild for our late-planting rule, so we give no later limit. For planting stock, the places nearby include Horto da Granja (garden centre, 13 km); addresses and opening hours are below.

Crocus in Porto: soil, season and weather

No month averages below 0 °C at night; the coldest nights, in January, average 6.2 °C.

Plantingby 19 November
First autumn frost19 December
Coldest nightsJanuary, 6.2 °C
Soil back at 1 °C in springalready in the first week of January
Daylight9:46 on 19 November
Daylight at the winter solstice9:12

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

Crocus in Porto: 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 Porto the average daily temperature stays at 10 °C or lower for about 3 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 Porto, Guarda is 24 days earlier and Braga 4 days later.

CityDistanceDateDifference
Braga47 kmby 23 November4 days later
Viana do Castelo63 kmby 12 November7 days earlier
Vila Real75 kmby 22 November3 days later
Viseu80 kmby 10 November9 days earlier
Guarda132 km26 October – end of December24 days earlier
Ourense146 kmby 3 November16 days earlier

Where to buy crocus for planting in Porto

Planting stock goes into the ground by 19 November; buy it before that. Within 15 km of Porto OpenStreetMap lists 13 garden centres, 6 farm-supply shops, 2 plant nurseries, 45 markets and 5 farm shops (collected 7 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Porto?

In Porto, crocus: plant by 19 November. The winter here is too mild for our late-planting rule, so we give no later limit.

When is the last spring frost in Porto?

Last spring frost around 26 January, first autumn frost around 19 December.

Other crops in Porto, with their dates