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When to plant hyacinths in Knoxville: by 13 October

In Knoxville, hyacinth: plant by 13 October. The winter here is too mild for our late-planting rule, so we give no later limit. For planting stock, the places nearby include Stanley's Greenhouse (plant nursery, 2 km); addresses and opening hours are below.

Hyacinth in Knoxville: soil, season and weather

Nights then average below 0 °C in January; the coldest, January, averages -0.5 °C.

Plantingby 13 October
First autumn frost12 November
Coldest nightsJanuary, -0.5 °C
Soil back at 1 °C in springalready in the first week of January
Daylight11:24 on 13 October
Daylight at the winter solstice9:43

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

Hyacinth in Knoxville: 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 Knoxville the average daily temperature stays at 10 °C or lower for about 15 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 Knoxville, Asheville is 10 days earlier and Greenville 10 days later.

CityDistanceDateDifference
Asheville130 km3 October – end of December10 days earlier
Chattanooga156 kmby 13 Octobersame day
Greenville184 kmby 23 October10 days later
Lexington231 km8 October – end of December5 days earlier
Atlanta249 kmby 23 October10 days later
Nashville258 kmby 15 October2 days later

Where to buy hyacinth for planting in Knoxville

Planting stock goes into the ground by 13 October; buy it before that. Within 15 km of Knoxville OpenStreetMap lists 7 garden centres, 1 plant nursery and 5 markets (collected 20 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Knoxville?

In Knoxville, hyacinth: plant by 13 October. The winter here is too mild for our late-planting rule, so we give no later limit.

When is the last spring frost in Knoxville?

Last spring frost around 29 March, first autumn frost around 12 November.

Other crops in Knoxville, with their dates