Arkansas Plant Hardiness Zones Map And Gardening Guide

Arkansas Plant Hardiness Zones

USDA Hardiness Zone	Average Minimum Extreme Winter Temperature Range Fahrenheit (°F) Celsius (°C)	Average Last Frost Date Range In Spring (Beginning Of The Growing Season)	Average First Frost Date Range In Autumn (End Of The Growing Season)
7a	0°F to 5°F -17.8°C to -15°C	Mid to late April	Mid to late October
7b	5°F to 10°F -15°C to -12.2°C	Early to mid-April	Late October
8a	10°F to 15°F -12.2°C to -9.4°C	Early April	Early November
8b	15°F to 20°F -9.4°C to -6.7°C	Late March to early April	Early to mid-November

Sources: 37-39

Arkansas Growing Conditions

Map showing Koppen climate types in Arkansas.

^{Credit to Wikipedia}

General Climate

Arkansas has a humid subtropical climate.

Though it is an inland state, it is close enough to the Gulf of Mexico for it to significantly affect its climate. The Ozark Mountains, located in the northwestern part of the state, also play a big role in this way.

When warm, humid air from the Gulf of Mexico meets the cold, drier mountain air, it lifts and creates storms.

Arkansas has a four-season climate with hot and humid summers and mild to cool winters. It receives around 50 inches (127 centimeters) of precipitation each year (the national average is approximately 28.5).

The driest region in the state is in the Ozark Mountains, and the wettest is in the southeastern part of the state, in the Ouachita Mountains.

Microclimates

USDA plant hardiness zones are an important starting point for your garden, but you’ll also need to consider microclimates.

Microclimates are areas where specific conditions create a climate different from the climate they’re situated in.

Buildings, fences, paved areas, or short hills and valleys can create these microclimates.

They can be as small as a space in your backyard or as large as a city.

In other words, learn about your local conditions from local experts to see if your garden falls into a microclimate.

Extreme Weather

Tornadoes

Tornadoes are most destructive when the funnel clouds become long enough to touch the ground.

They can be one of the most damaging weather events.

While tornadoes can occur in Arkansas at any time of year, most activity occurs between March and May and November and January.

Tornadoes in Arkansas tend to move from southwest to northeast.

Beyond general storm preparation around your home, there is little you can do to protect your garden from tornadoes.

Ice Storms

An ice storm is a winter storm with freezing rain that builds on exposed surfaces to a thickness of at least ¼ of an inch.

The result is extremely slippery roads and walkways. The ice is also very heavy and can cause tree branches, powerlines, and even roofs to break under their weight.

Ice storms present serious hazards. Unfortunately, beyond general storm preparation, you cannot do much to protect your garden from them.

If your trees and shrubs sustain damage due to ice storms, the best thing you can do is prune away broken branches.

Thunderstorms

Thunderstorms often distribute large amounts of precipitation in Arkansas’ warmer months, potentially resulting in flooding.

Flooding can create several problems in your garden, including:

Potential structural damage to beds and containers
Soil erosion
Plant damage

Additionally, flooding can bring contaminated water into contact with your plants. If it does, remove those plants, especially if they’re edible.

Growing Season

Arkansas’s growing season is long and runs from late March to mid-November (depending on the region).

Gardening in Arkansas takes a bit of planning around when to plant different crops. Some vegetables require a cool growing season and need to be planted early enough to be harvested before the heat of summer peaks. Other plants need longer periods of time and heat to reach maturity.

Developing a seeding schedule that ensures each variety you want to grow has enough time to mature within your area’s expected temperatures and conditions can be very helpful.

Arkansas Gardening Tips

Tulips flowering at Garvan Woodland Gardens Arkansas

Choose The Right Plants

Choose native plants for your garden. Doing so improves your chances of successfully growing them. They’ll be better adapted to your area’s local conditions and challenges.

Manage Water

Gardeners in most parts of Arkansas receive ample precipitation, though, in recent years, the state has also experienced drought conditions.

As such, you’ll need to adapt to current conditions to ensure your plants receive the right amount of water.

To mitigate the potential of too much water, ensure adequate drainage in your garden. This may be filling in low spots to strengthen sloping and natural runoff courses. This could also be capturing water and incorporating a rain garden.

In drier seasons, we recommend you:

Use a layer of mulch around plants to retain water
Water deeply once a week to encourage deep root growth in plants
Water in the morning or evening to reduce evaporation

Pest and Disease Management

Due to high precipitation levels across most of the state, you are advised to manage disease and pest problems that may arise due to excessive moisture.

This can include:

Using mulch at the base of plants to prevent splash up from soil and transmission of soil-borne fungal pathogens
Ensuring plants have adequate spacing to allow good airflow
Choosing to transplant instead of direct sowing because transplants will withstand some predatory eating from slugs or cutworms and the like
Selecting local and disease-resistant varieties
Practicing good garden hygiene and removing decaying vegetation to avoid providing a habitat for destructive insects

Consult With Local Professionals

Consulting with local gardening professionals allows you to benefit from their experience with your area’s conditions, the plants that do well there, and overall best practices.

Arkansas Plant Suggestions

Trees

Loblolly Pine (Pinus taeda)
White Oak (Quercus shumardii)
Southern Magnolia (Magnolia grandiflora)

Shrubs

Ozark Mock Orange (Philadelphus pubescens)
Two-wing Silverbell (Halesia diptera)
Deerberry (Vaccinium stamineum)

Flowers

Apple Blossom (Pyrus coronaria)
Hooked Buttercup (Ranunculus recurvatus)
Blue-waterleaf (Hydrolea ovata)

Vegetables

Bradley Pink Tomatoes (Lycopersicon esculentum “Bradley”)
Sweet Potatoes (Ipomoea batatas)
Zucchini (Curcubita pepo)

Herbs

Goldenseal (Hydrastis canadensis)
Chamomile (Matricaria chamomilla)
Chives (Allium schoenoprasum)

Spices

Caraway (Carum carvi)
Anise seed (Pimpinella anisum)
Carolina Allspice (Calycanthus floridus)

Note on the last one: The bark is dehydrated, ground and used as a cinnamon replacement. However, there is some evidence the flower and seeds are toxic to humans.^{29, 30}

Fruits

Persimmons (Diospyros virginiana)
Jujubes (Ziziphus ziziphus)
Pawpaws (Asimina triloba)

Succulents

Nuttall’s Stonecrop (Sedum nuttallii)
Widow’s Cross (Sedum pulchellum)
Woodland Stonecrop (Sedum ternatum)

Disclaimer

Any of the above can change and is not exhaustive.

Treat anything above like a good starter guide. Then use that as a foundation as you consult with local gardeners, professionals, forecasts, guides, and organizations.

Sources

“Climate and Weather”. Encyclopedia of Arkansas. Accessed March 20, 2024.
“Arkansas – State Climate Summaries 2022”. NOAA National Centers For Environmental Information. Accessed March 20, 2024.
“Climate and Monthly Weather Forecast Arkansas”. Weather US. Accessed March 20, 2024.
“Climate in Arkansas”. Worlddata.info. Accessed March 20, 2024.
“NWS Little Rock, AR – Arkansas Yearly Climate Summary (2019)”. National Weather Service. Accessed March 20, 2024.
“Annual 2022 National Climate Report.” NOAA National Centers For Environmental Information. Accessed March 20, 2024.
“Threats and Hazards – Arkansas Division of Emergency Management”. Arkansas Department of Public Safety. Accessed March 20, 2024.
“Natural Disaster Recovery in Arkansas”. University of Arkansas, Division of Agriculture, Research and Extension. Accessed March 20, 2024.
“About Tornadoes – Tornadoes – Nature’s Most Violent Storms”. National Weather Service. Accessed March 20, 2024.
Kwasnik, Brianna. “How to prepare for a tornado in Arkansas”. Arkansas Democrat Gazette. May 1, 2022. Accessed March 20, 2024.
“Winter Storms/Ice Storms”. University of Central Arkansas, Police Department. Accessed March 20, 2024.
“Ice Storms”. National Weather Service. Accessed March 20, 2024.
“Severe Weather 101 – Winter Storms”. NOAA, National Severe Storms Laboratory. Accessed March 20, 2024.
“Freezing Rain and Sleet”. National Weather Service. Accessed March 20, 2024.
“Floods”. Encyclopedia of Arkansas. Accessed March 20, 2024.
“When to Plant Vegetables in Arkansas”. The National Gardening Association. Accessed March 20, 2024.
“Planning a Vegetable Garden in Arkansas”. University of Arkansas, Division of Agriculture, Research and Extension. Accessed March 20, 2024.
“Loblolly Pine”. University of Arkansas, Division of Agriculture, Research and Extension. Accessed March 20, 2024.
“White Oak”. Arkansas Department of Agriculture, Forestry. Accessed March 20, 2024.
Southern Magnolia. Arkansas Department of Agriculture, Forestry. Accessed March 20, 2024.
“Ozark Mock Orange”. Arkansas Native Plant Society. Accessed March 20, 2024.
“Two-winged Silverbell”. Arkansas Native Plant Society. Accessed March 20, 2024.
“Deerberry”. Arkansas Native Plant Society. Accessed March 20, 2024.
“Official State Flower – Apple Blossom”. Encyclopedia of Arkansas. Accessed March 20, 2024.
“Hooked Buttercup”. Arkansas Native Plant Society. Accessed March 20, 2024.
“Blue Waterleaf”. Arkansas Heritage. Accessed March 20, 2024.
“Planting Dates for Arkansas Spring and Summer Vegetable Production”. University of Arkansas, Division of Agriculture, Research and Extension. Accessed March 20, 2024.
“Bradley Pink Tomatoes – Official State Fruit and Vegetable”. Encyclopedia of Arkansas. Accessed March 20, 2024.
“Carolina Allspice (Calycanthus floridus)”. Practical Plants. Accessed March 20, 2024.
“Persimmons – Home Garden Fruit Trees in Arkansas”. University of Arkansas, Division of Agriculture, Research and Extension. Accessed March 20, 2024.
“Jujubes – Home Garden Fruit Trees in Arkansas”. University of Arkansas, Division of Agriculture, Research and Extension. Accessed March 20, 2024.
“Pawpaws – Home Garden Fruit Trees in Arkansas”. University of Arkansas, Division of Agriculture, Research and Extension. Accessed March 20, 2024.
“Nuttall’s Stonecrop”. Arkansas Native Plant Society. Accessed March 20, 2024.
“Widow’s Cross” Arkansas Native Plant Society. Accessed March 20, 2024.
“Woodland Stonecrop”. Arkansas Native Plant Society. Accessed March 20, 2024.
“Average Last Frost Dates Arkansas. Plantmaps.com. Accessed March 20, 2024.
“2024 First and Last Frost Dates for Places in Arkansas”. Almanac. Accessed March 20, 2024.
“USDA Hardiness Zone Map Arkansas”. USDA. Accessed March 20, 2024.