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When to plant hyacinths in Louisville: 12 October – end of December

In Louisville, hyacinth: plant from 12 October to the end of December. For planting stock, the places nearby include Grant Line Nursery & Garden Center (garden centre, 9 km); addresses and opening hours are below.

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 Louisville: soil, season and weather

Nights then average below 0 °C in January, February; the coldest, January, averages -2.4 °C.

Planting12 October – end of December
First autumn frost11 November
Coldest nightsJanuary, -2.4 °C
Soil back at 1 °C in springalready in the first week of January
Daylight11:22 on 12 October
Daylight at the winter solstice9:30

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

Hyacinth in Louisville: 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 Louisville the average daily temperature stays at 10 °C or lower for about 18 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 Louisville, Frankfort is 8 days earlier and Nashville 3 days later.

CityDistanceDateDifference
Frankfort78 km4 October – end of December8 days earlier
Lexington116 km8 October – end of December4 days earlier
Cincinnati146 km10 October – end of December2 days earlier
Evansville159 km11 October – end of December1 day earlier
Indianapolis173 km7 October – 23 December5 days earlier
Nashville249 kmby 15 October3 days later

Where to buy hyacinth for planting in Louisville

Planting stock goes into the ground from 12 October to the end of December; buy it before that. Within 15 km of Louisville OpenStreetMap lists 1 garden centre, 1 farm-supply shop, 1 plant nursery and 7 markets (collected 20 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Louisville?

In Louisville, hyacinth: plant from 12 October to the end of December. 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 Louisville?

Last spring frost around 6 April, first autumn frost around 11 November.

Other crops in Louisville, with their dates