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When to plant hyacinths in Fort Smith: by 19 October

In Fort Smith, hyacinth: plant by 19 October. The winter here is too mild for our late-planting rule, so we give no later limit.

Hyacinth in Fort Smith: soil, season and weather

Nights then average below 0 °C in January; the coldest, January, averages -0.2 °C.

Plantingby 19 October
First autumn frost18 November
Coldest nightsJanuary, -0.2 °C
Soil back at 1 °C in springalready in the first week of January
Daylight11:12 on 19 October
Daylight at the winter solstice9:46

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

Hyacinth in Fort Smith: 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 Fort Smith the average daily temperature stays at 10 °C or lower for about 13 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 Fort Smith, Joplin is 17 days earlier and Shreveport 21 days later.

CityDistanceDateDifference
Fayetteville78 km11 October – end of December8 days earlier
Tulsa169 kmby 18 October1 day earlier
Joplin189 km2 October – end of December17 days earlier
Little Rock203 kmby 21 October2 days later
Oklahoma City285 kmby 11 October8 days earlier
Shreveport329 kmby 9 November21 days later

Where to buy hyacinth for planting in Fort Smith

Planting stock goes into the ground by 19 October; buy it before that. Within 15 km of Fort Smith OpenStreetMap lists 1 garden centre and 1 plant nursery (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Fort Smith?

In Fort Smith, hyacinth: plant by 19 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 Fort Smith?

Last spring frost around 16 March, first autumn frost around 18 November.

Other crops in Fort Smith, with their dates