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When to plant hyacinths in Bahía Blanca: by 16 May

In Bahía Blanca, hyacinth: plant by 16 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 las Magnolias (garden centre, 2 km) and JL (garden centre, 3 km); addresses and opening hours are below.

Hyacinth in Bahía Blanca: soil, season and weather

No month averages below 0 °C at night; the coldest nights, in July, average 4.8 °C.

Plantingby 16 May
First autumn frost15 June
Coldest nightsJuly, 4.8 °C
Soil back at 1 °C in springalready in the first week of July
Daylight10:01 on 16 May
Daylight at the winter solstice9:27

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

Hyacinth in Bahía Blanca: depth, winter cold, pests and pets

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

In Bahía Blanca the average daily temperature stays at 10 °C or lower for about 7 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 Bahía Blanca, Bariloche is 155 days earlier and San Luis 8 days later.

CityDistanceDateDifference
Santa Rosa293 kmby 14 May2 days earlier
Neuquén502 kmby 10 May6 days earlier
Trelew565 kmby 29 April17 days earlier
San Luis705 kmby 24 May8 days later
San Rafael707 kmby 6 May10 days earlier
Bariloche816 km12 December – 14 May155 days earlier

Where to buy hyacinth for planting in Bahía Blanca

Planting stock goes into the ground by 16 May; buy it before that. Within 15 km of Bahía Blanca OpenStreetMap lists 9 garden centres and 4 markets (collected 27 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Bahía Blanca?

In Bahía Blanca, hyacinth: plant by 16 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 Bahía Blanca?

Last spring frost around 8 August, first autumn frost around 15 June.

Other crops in Bahía Blanca, with their dates