When to plant hyacinths in Coyhaique: 15 December – 25 May

In Coyhaique, hyacinth: plant from 15 December to about 25 May.

Bulbs are best planted early in the window: late-planted bulbs may flower later or less well. Late planting works only while the soil can be dug. Mulch after planting.

The date is about two weeks before the average daily temperature here falls below 0 °C (ten years of weather): an estimate, not the day the ground freezes, and a cold spell can freeze it earlier. Sources: Iowa State University Extension, Wisconsin Horticulture Extension, UNH Extension, RHS, how the ground freezes (NRC Canada, CBD-26).

Hyacinth in Coyhaique: soil, season and weather

Nights then average below 0 °C in May–October; the coldest, July, averages -3.6 °C.

Planting	15 December – 25 May
First autumn frost	14 January
Coldest nights	July, -3.6 °C
Soil back at 1 °C in spring	16 September
Daylight	15:40 on 15 December
Daylight at the winter solstice	8:41

The same dates in Coyhaique hold for Garlic, Tulip, Daffodil and Crocus.

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

Plant hyacinths 10 cm deep, at least 7.5 cm apart (RHS). In the ground hyacinths are fully hardy, but in containers they can be frost tender in cold winters (RHS); here winter nights average below 0 °C, so wrap the pots or move them to a sheltered spot.

In Coyhaique the average daily temperature stays at 10 °C or lower for about 50 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 Coyhaique, Bariloche is 3 days earlier and Valdivia 151 days later.

City	Distance	Date	Difference
Comodoro Rivadavia	357 km	by 24 April	130 days later
Puerto Montt	461 km	by 7 May	143 days later
Bariloche	495 km	12 December – 14 May	3 days earlier
Osorno	563 km	by 3 May	139 days later
Trelew	595 km	by 29 April	135 days later
Valdivia	648 km	by 15 May	151 days later

Where to buy hyacinth for planting in Coyhaique

Planting stock goes into the ground from 15 December to about 25 May; buy it before that. Within 15 km of Coyhaique OpenStreetMap lists 3 markets (collected 28 October 2026).

El Campesino — market
Francisco Bilbao, Coyhaique · 1 km
Feria Horticola Regional — market
Sat 08:00–14:00 · 1 km
Feria Regional de Coyhaique — market · sells: live_animal
6 km · feriaregionaltattersallcoyhaique.cl

Questions