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When to plant hyacinths in Potosí: 3 January – end of June

In Potosí, hyacinth: plant from 3 January 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 Potosí: soil, season and weather

Nights then average below 0 °C in June–August; the coldest, June, averages -0.9 °C.

Planting3 January – end of June
First autumn frost2 February
Coldest nightsJune, -0.9 °C
Soil back at 1 °C in springalready in the first week of July
Daylight13:17 on 3 January
Daylight at the winter solstice10:57

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

Hyacinth in Potosí: 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 Potosí the average daily temperature stays at 10 °C or lower for about 52 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

All the nearest cities on our list plant hyacinth later than Potosí; the closest date is in La Paz, 77 days later.

CityDistanceDateDifference
Oruro228 kmby 31 March87 days later
La Paz426 kmby 21 March77 days later
Puno614 kmby 26 March82 days later
Cusco944 kmby 16 May133 days later
Ayacucho1,151 kmby 1 May118 days later
San Juan1,359 kmby 21 May138 days later

Where to buy hyacinth for planting in Potosí

Planting stock goes into the ground from 3 January to the end of June; buy it before that. Within 15 km of Potosí OpenStreetMap lists 16 markets (collected 27 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Potosí?

In Potosí, hyacinth: plant from 3 January 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.

When is the last spring frost in Potosí?

Last spring frost around 21 November, first autumn frost around 2 February.

Other crops in Potosí, with their dates