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When to plant hyacinths in Tulsa: by 18 October

In Tulsa, hyacinth: plant by 18 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 Tulsa Feed (farm supply, 10 km) and Southwood Landscape and Garden Center (plant nursery, 13 km); addresses and opening hours are below.

Hyacinth in Tulsa: soil, season and weather

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

Plantingby 18 October
First autumn frost17 November
Coldest nightsJanuary, -0.9 °C
Soil back at 1 °C in springalready in the first week of January
Daylight11:12 on 18 October
Daylight at the winter solstice9:42

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

Hyacinth in Tulsa: 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 Tulsa the average daily temperature stays at 10 °C or lower for about 14 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 Tulsa, Wichita is 18 days earlier and Fort Smith 1 day later.

CityDistanceDateDifference
Oklahoma City157 kmby 11 October7 days earlier
Fayetteville165 km11 October – end of December7 days earlier
Joplin168 km2 October – end of December16 days earlier
Fort Smith169 kmby 19 October1 day later
Wichita209 km30 September – end of December18 days earlier
Lawton278 kmby 12 October6 days earlier

Where to buy hyacinth for planting in Tulsa

Planting stock goes into the ground by 18 October; buy it before that. Within 15 km of Tulsa OpenStreetMap lists 8 garden centres, 2 farm-supply shops, 1 plant nursery, 1 market and 1 farm shop (collected 20 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Tulsa?

In Tulsa, hyacinth: plant by 18 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 Tulsa?

Last spring frost around 6 March, first autumn frost around 17 November.

Other crops in Tulsa, with their dates