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When to plant hyacinths in Oklahoma City: by 11 October

In Oklahoma City, hyacinth: plant by 11 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 Smith Farm and Garden (garden centre, 6 km) and Walmart Garden Center (garden centre, 9 km); addresses and opening hours are below.

Hyacinth in Oklahoma City: soil, season and weather

Nights then average below 0 °C in January; the coldest, January, averages -0.7 °C.

Plantingby 11 October
First autumn frost10 November
Coldest nightsJanuary, -0.7 °C
Soil back at 1 °C in springalready in the first week of January
Daylight11:29 on 11 October
Daylight at the winter solstice9:46

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

Hyacinth in Oklahoma City: 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 Oklahoma City 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 Oklahoma City, Wichita is 11 days earlier and Dallas 25 days later.

CityDistanceDateDifference
Lawton126 kmby 12 October1 day later
Tulsa157 kmby 18 October7 days later
Wichita247 km30 September – end of December11 days earlier
Fort Smith285 kmby 19 October8 days later
Fort Worth305 kmby 31 October20 days later
Dallas306 kmby 5 November25 days later

Where to buy hyacinth for planting in Oklahoma City

Planting stock goes into the ground by 11 October; buy it before that. Within 15 km of Oklahoma City OpenStreetMap lists 3 garden centres, 2 farm-supply shops and 4 markets (collected 20 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant hyacinths in Oklahoma City?

In Oklahoma City, hyacinth: plant by 11 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 Oklahoma City?

Last spring frost around 14 March, first autumn frost around 10 November.

Other crops in Oklahoma City, with their dates