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When to plant hyacinths in Rancagua: by 13 May

In Rancagua, hyacinth: plant by 13 May. The winter here is too mild for our late-planting rule, so we give no later limit. For planting stock, the places nearby include Jardín Rosal de Las Mercedes (garden centre, 11 km) and Vivero Karü (garden centre, 11 km); addresses and opening hours are below.

Hyacinth in Rancagua: soil, season and weather

No month averages below 0 °C at night; the coldest nights, in July, average 4.3 °C.

Plantingby 13 May
First autumn frost12 June
Coldest nightsJuly, 4.3 °C
Soil back at 1 °C in springalready in the first week of July
Daylight10:25 on 13 May
Daylight at the winter solstice9:52

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

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

Plant hyacinths 10 cm deep, at least 7.5 cm apart (RHS).

In Rancagua the average daily temperature stays at 10 °C or lower for about 9 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. That is less than the bulbs need, and without more cold they may not flower properly. Where winters are not cold enough for long enough, LSU AgCenter keeps tulip and hyacinth bulbs in the refrigerator for at least six to eight weeks before planting, and plants them only once the soil has cooled: warm soil can cancel the chilling. Keep fruit out of that refrigerator — ripening fruit gives off ethylene, which harms the flowers (Wisconsin Horticulture Extension).

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, LSU AgCenter, ASPCA.

Hyacinth in nearby cities

Around Rancagua, San Rafael is 7 days earlier and San Juan 8 days later.

CityDistanceDateDifference
Curicó102 kmby 8 May5 days earlier
Talca162 kmby 14 May1 day later
San Rafael226 kmby 6 May7 days earlier
Mendoza227 kmby 18 May5 days later
Chillán298 kmby 13 Maysame day
San Juan358 kmby 21 May8 days later

Where to buy hyacinth for planting in Rancagua

Planting stock goes into the ground by 13 May; buy it before that. Within 15 km of Rancagua OpenStreetMap lists 8 garden centres, 2 farm-supply shops, 1 plant nursery, 2 markets and 1 farm shop (collected 27 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Rancagua?

In Rancagua, hyacinth: plant by 13 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 Rancagua?

Last spring frost around 18 August, first autumn frost around 12 June.

Other crops in Rancagua, with their dates