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When to plant hyacinths in Christchurch: by 6 May

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

Hyacinth 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 Crocus.

Hyacinth in Christchurch: depth, winter cold, pests and pets

Plant hyacinths 10 cm deep, at least 7.5 cm apart (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 12–15 weeks at about 2–10 °C. The winter here gives that in the ground, so the bulbs need no pre-chilling.

Flowers get smaller in the years after planting: for full spikes, replace the bulbs or add a few new ones each autumn (RHS).

If squirrels are a problem, protect the bulbs with wire mesh (RHS). Hyacinths are toxic to dogs, cats and horses: intense vomiting and diarrhoea (ASPCA).

Sources: RHS, Wisconsin Horticulture Extension, ASPCA.

Hyacinth 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 hyacinth 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 hyacinths in Christchurch?

In Christchurch, hyacinth: 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