Greenly Garden
Get the app
EN

When to plant crocuses in Christchurch: by 6 May

In Christchurch, crocus: plant by 6 May. The winter here is too mild for our late-planting rule, so we give no later limit.

Crocus in Christchurch: soil, season and weather

No month averages below 0 °C at night; the coldest nights, in July, average 4.4 °C.

Plantingby 6 May
First autumn frost5 June
Coldest nightsJuly, 4.4 °C
Soil back at 1 °C in springalready in the first week of July
Daylight10:00 on 6 May
Daylight at the winter solstice8:56

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

Crocus in Christchurch: 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 Christchurch 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 Christchurch, Queenstown is 16 days earlier and Nelson 16 days later.

CityDistanceDateDifference
Timaru147 kmby 5 May1 day earlier
Blenheim249 kmby 1 May5 days earlier
Nelson257 kmby 22 May16 days later
Dunedin310 km22 April – end of June14 days earlier
Queenstown358 km20 April – end of June16 days earlier
Palmerston North430 kmby 22 May16 days later

Where to buy crocus for planting in Christchurch

Planting stock goes into the ground by 6 May; buy it before that. Within 15 km of Christchurch OpenStreetMap lists 13 garden centres, 14 plant nurseries, 7 markets and 1 farm shop (collected 7 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Christchurch?

In Christchurch, crocus: plant by 6 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 Christchurch?

Last spring frost around 10 August, first autumn frost around 5 June.

Other crops in Christchurch, with their dates