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When to plant crocuses in Viseu: by 10 November

In Viseu, crocus: plant by 10 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 Agriloja (farm supply, 2 km); addresses and opening hours are below.

Crocus in Viseu: soil, season and weather

No month averages below 0 °C at night; the coldest nights, in January, average 3.7 °C.

Plantingby 10 November
First autumn frost10 December
Coldest nightsJanuary, 3.7 °C
Soil back at 1 °C in springalready in the first week of January
Daylight10:07 on 10 November
Daylight at the winter solstice9:15

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

Crocus in Viseu: 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 Viseu the average daily temperature stays at 10 °C or lower for about 14 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 Viseu, Guarda is 15 days earlier and Castelo Branco 16 days later.

CityDistanceDateDifference
Guarda56 km26 October – end of December15 days earlier
Vila Real73 kmby 22 November12 days later
Porto80 kmby 19 November9 days later
Castelo Branco100 kmby 26 November16 days later
Braga108 kmby 23 November13 days later
Viana do Castelo138 kmby 12 November2 days later

Where to buy crocus for planting in Viseu

Planting stock goes into the ground by 10 November; buy it before that. Within 15 km of Viseu OpenStreetMap lists 1 garden centre, 6 farm-supply shops and 4 markets (collected 27 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Viseu?

In Viseu, crocus: plant by 10 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 Viseu?

Last spring frost around 7 February, first autumn frost around 10 December.

Other crops in Viseu, with their dates