Texas redbud(Cercis canadensis var. texensis 'Oklahoma')

Overview

Oklahoma Texas redbud (Cercis canadensis var. texensis ‘Oklahoma’) is an elite native flowering small tree hardy across USDA Zones 6 through 9. Discovered in 1964 growing on the arid limestone slopes of the Arbuckle Mountains in Oklahoma, it is celebrated as the premier redbud for hot, sun-baked southern and western climates. Maturing into a dense, rounded vase-shaped canopy 15 to 20 feet tall and wide, it combines the richest, deepest wine-purple spring blossoms in the genus with thick, leathery heart-shaped leaves boasting a brilliant, mirror-like patent-leather gloss.

Unlike common eastern redbuds whose leaves are thin and prone to summer scorch, ‘Oklahoma’ features waxy, drought-resistant foliage that reflects intense heat and sun.

How to Grow

• Sunlight: Full sun (at least 6 hours direct daily light) produces the highest flower count and glossiest leaf cuticle.
• Limestone & Alkaline Soil Adaptation: Naturally adapted to caliche and limestone soils, ‘Oklahoma’ thrives in high-pH alkaline soils (pH 7.0 to 8.2) that cause severe iron chlorosis in acid-loving ornamentals.
• Sharp Drainage is Essential: Intolerant of poorly drained, waterlogged, or soggy soils. While young trees require regular moisture to establish roots, mature specimens exhibit exceptional drought tolerance.
• Taproot Protection: Like all redbuds, it develops a deep, searching taproot. Plant young container-grown stock and avoid attempting to transplant established trees.
• Pruning Discipline: Prune lightly immediately after spring flowering to remove crossing or dead branches. Avoid heavy winter shearing.

Landscape Uses

• Flowering Specimen Lawn Tree: Bursts with saturated wine-magenta blooms along bare branches before leaves emerge in early spring.
• Courtyard & Patio Anchor: Thick glossy leaves provide lush green shade without outgrowing residential property boundaries.
• Xeriscape & Water-Wise Gardens: Outstanding native flowering tree for drought-prone regions in Texas, Oklahoma, and the Southwest.

Potential Problems

• Canker in Drought-Stressed Trees: Can be susceptible to Botryosphaeria canker if severely stressed; maintain adequate mulch and water during establishment.
• Transplant Shock: Deep taproot makes moving established trees very difficult; site carefully at planting.
• Poor Drainage: Saturated, standing water causes fatal root rot.

Frequently Asked Questions

How is Oklahoma redbud different from regular eastern redbud?

‘Oklahoma’ features much thicker, leathery leaves with an intense mirror-like shine, deeper wine-purple flowers, and significantly higher heat and drought tolerance.

Can Oklahoma redbud grow in alkaline limestone soil?

Yes. It is native to limestone mountain regions and thrives in high-pH soils where other redbuds struggle.

Does Oklahoma redbud get fall color?

Yes. In late October, the glossy green leaves transition to a bright, clear canary-yellow before dropping.

Companion Plants

Pair Oklahoma Texas redbud with native sun-loving shrubs and perennials adapted to dry, alkaline soils:

• Flowering Native Shrubs: Plant near Texas sage (Leucophyllum frutescens), Mexican buckeye, or agarita.
• Sun-Loving Perennials: Combine with blackfoot daisy (Melampodium leucanthum), autumn sage (Salvia greggii), and purple coneflowers.
• Ornamental Grasses: Interplant with Mexican feather grass (Nassella tenuissima) or little bluestem (Schizachyrium scoparium).

Sources & Lineage

• Missouri Botanical Garden PlantFinder: Record taxon 295790 (Cercis canadensis var. texensis ‘Oklahoma’) — Arbuckle Mountains origin, morphology, and culture.
• Kew Plants of the World Online (POWO): Cercis canadensis L. (POWO: 316243-2) — species taxonomy, family (Fabaceae), and botanical variety.
• Oklahoma State University Extension: Oklahoma Proven: ‘Oklahoma’ Redbud — cultivar performance trials, heat resilience, and landscape management.