When to plant hyacinths in Río Gallegos: 7 March – end of June

In Río Gallegos, hyacinth: plant from 7 March to the end of June.

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 average daily temperature here stays above 0 °C all winter, and at least three months average 7 °C or less: our rule of thumb for the winter cold spring bulbs need. Sources: Iowa State University Extension, Wisconsin Horticulture Extension, UNH Extension, RHS.

Hyacinth in Río Gallegos: soil, season and weather

Nights then average below 0 °C in June–August; the coldest, July, averages -1.8 °C.

Planting	7 March – end of June
First autumn frost	6 April
Coldest nights	July, -1.8 °C
Soil back at 1 °C in spring	26 July
Daylight	13:06 on 7 March
Daylight at the winter solstice	7:48

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

Hyacinth in Río Gallegos: 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 Río Gallegos the average daily temperature stays at 10 °C or lower for about 31 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 Río Gallegos, Coyhaique is 82 days earlier and Puerto Montt 61 days later.

City	Distance	Date	Difference
Punta Arenas	206 km	8 March – end of June	1 day later
Ushuaia	360 km	27 December – 18 May	70 days earlier
Comodoro Rivadavia	653 km	by 24 April	48 days later
Coyhaique	704 km	15 December – 25 May	82 days earlier
Trelew	976 km	by 29 April	53 days later
Puerto Montt	1,164 km	by 7 May	61 days later

Where to buy hyacinth for planting in Río Gallegos

Planting stock goes into the ground from 7 March to the end of June; buy it before that. Within 15 km of Río Gallegos OpenStreetMap lists 1 plant nursery (collected 28 October 2026).

Vivero Los Fresnos — plant nursery
0 km

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