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When to plant hyacinths in San Rafael: by 6 May

In San Rafael, hyacinth: plant by 6 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 Vivero Cedro Azul (garden centre, 2 km); addresses and opening hours are below.

Hyacinth in San Rafael: soil, season and weather

No month averages below 0 °C at night; the coldest nights, in July, average 2.2 °C.

Plantingby 6 May
First autumn frost5 June
Coldest nightsJuly, 2.2 °C
Soil back at 1 °C in springalready in the first week of July
Daylight10:35 on 6 May
Daylight at the winter solstice9:50

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

Hyacinth in San Rafael: depth, winter cold, pests and pets

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

In San Rafael 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

All the nearest cities on our list plant hyacinth later than San Rafael; the closest date is in Curicó, 2 days later.

CityDistanceDateDifference
Mendoza198 kmby 18 May12 days later
Rancagua226 kmby 13 May7 days later
San Luis238 kmby 24 May18 days later
Curicó268 kmby 8 May2 days later
Talca314 kmby 14 May8 days later
San Juan343 kmby 21 May15 days later

Where to buy hyacinth for planting in San Rafael

Planting stock goes into the ground by 6 May; buy it before that. Within 15 km of San Rafael OpenStreetMap lists 1 garden centre, 1 market and 1 farm shop (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in San Rafael?

In San Rafael, 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 San Rafael?

Last spring frost around 23 August, first autumn frost around 5 June.

Other crops in San Rafael, with their dates