North America Native Plant

Buckeye

Botanical name: Aesculus ×mutabilis

USDA symbol: AEMU

Life cycle: perennial

Habit: tree

Native status: Native to the lower 48 states  

Synonyms: Aesculus ×harbisonii Sarg. (AEHA)   

The Mysterious Hybrid Buckeye: A Hidden Gem for Southeastern Gardens Meet Aesculus ×mutabilis, a rather enigmatic member of the buckeye family that’s quietly growing in scattered locations across the Southeastern United States. While this hybrid buckeye might not be as famous as its more well-known cousins, it offers an intriguing ...

The Mysterious Hybrid Buckeye: A Hidden Gem for Southeastern Gardens

Meet Aesculus ×mutabilis, a rather enigmatic member of the buckeye family that’s quietly growing in scattered locations across the Southeastern United States. While this hybrid buckeye might not be as famous as its more well-known cousins, it offers an intriguing opportunity for native plant enthusiasts who love discovering something truly unique for their landscapes.

What Makes This Buckeye Special?

The × in Aesculus ×mutabilis tells us we’re dealing with a natural hybrid – essentially nature’s own experiment in plant breeding. This buckeye is also known by the synonym Aesculus ×harbisonii, and like all members of its family, it’s a perennial woody tree that typically grows with a single trunk reaching heights greater than 13-16 feet under ideal conditions.

Where You’ll Find This Native Beauty

This buckeye calls the Southeastern United States home, with documented populations in Alabama, Florida, Georgia, Kentucky, North Carolina, South Carolina, and Tennessee. It’s a true native to the lower 48 states, making it an excellent choice for gardeners interested in supporting local ecosystems.

The Challenge (and Appeal) of Growing Aesculus ×mutabilis

Here’s where things get interesting – and a bit challenging. This hybrid buckeye is somewhat of a botanical mystery, with limited cultivation information readily available. This scarcity of growing guides actually makes it an exciting choice for adventurous gardeners who enjoy being plant pioneers in their neighborhoods.

Why Consider This Buckeye for Your Garden?

  • Native credentials: Supporting local wildlife and ecosystems by choosing indigenous plants
  • Uniqueness factor: Few gardeners will have this particular species, making your landscape truly distinctive
  • Tree presence: As a substantial woody perennial, it can serve as an anchor plant in larger landscapes
  • Regional adaptation: Naturally suited to Southeastern growing conditions

The Reality Check

Before you get too excited, let’s be honest about the challenges. The limited availability of specific growing information for Aesculus ×mutabilis means you’ll need to be prepared for some trial and learning. You might need to extrapolate care requirements from related buckeye species and be patient as you discover what works best in your particular garden conditions.

Getting Started

If you’re determined to try growing this unique buckeye, your best bet is to:

  • Contact native plant societies in the Southeastern states where it naturally occurs
  • Connect with botanical gardens or arboretums in the region
  • Look for specialty native plant nurseries that might have experience with rare buckeyes
  • Consider joining online forums dedicated to native Southeastern plants

Alternative Options

If Aesculus ×mutabilis proves too elusive, consider other native buckeyes like the Red Buckeye (Aesculus pavia) or Ohio Buckeye (Aesculus glabra), which are more readily available and have well-documented growing requirements while still providing the native benefits you’re seeking.

The Bottom Line

Aesculus ×mutabilis represents the kind of native plant that appeals to collectors and conservation-minded gardeners who aren’t afraid of a challenge. While it may require more detective work than your average nursery purchase, successfully growing this hybrid buckeye would make you part of a very exclusive club of gardeners preserving and cultivating our native plant heritage.

Just remember – sometimes the most rewarding plants are the ones that make you work a little harder to understand and appreciate them!

Buckeye

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Sapindales

Family

Hippocastanaceae A. Rich. - Horse-chestnut family

Genus

Aesculus L. - buckeye

Species

Aesculus ×mutabilis (Spach) Scheele [pavia × sylvatica] - buckeye

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA