Date of Graduation

12-2025

Document Type

Thesis

Degree Name

Master of Science in Horticulture (MS)

Degree Level

Graduate

Department

Horticulture

Advisor/Mentor

Richardson, Mike

Committee Member

Philipp, Dirk

Second Committee Member

Wright-Smith, Hannah

Keywords

tallgrass prairies; endangered ecosystems; roadside vegetation

Abstract

Tallgrass prairies are among the most endangered ecosystems in North America, with Arkansas having lost over 99% of its native grasslands. This research evaluated the potential for using native tallgrass prairie species in Arkansas roadside vegetation. Two field experiments were conducted from 2022 to 2024. The first assessed seven native seed mixtures at three roadside locations (Clarksville, Huntsville, and Newport). Seed mixture composition significantly influenced establishment outcomes, with early-establishing forbs such as black-eyed Susan, partridge pea, and Illinois bundleflower performing well, though establishment varied by location. A second trial compared planting date (Autumn, Winter, Spring) and planting method (broadcast, drill seeding, hydroseeding). Autumn plantings favored forb establishment, whereas Winter and Spring plantings supported establishment of some grass species. Hydroseeding produced more uniform establishment, particularly for forbs, while drill seeding improved establishment of certain grass species. Results suggest that species-specific responses to planting date and method need to be more carefully considered. Some species may establish better at certain times of year or with particular methods, indicating that multiple planting times or targeted seeding strategies may be necessary depending on project goals and desired species composition. This research offers practical guidance for integrating native prairie species into roadside vegetation management in Arkansas. Using native vegetation can reduce maintenance inputs, support pollinator habitat, improve erosion control, and help restore Arkansas’s lost grassland ecosystems along transportation corridors.

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