North America Native Plant

Hybrid Locust

Botanical name: Robinia ×longiloba

USDA symbol: ROLO2

Life cycle: perennial

Habit: tree

Native status: Native to the lower 48 states  

Hybrid Locust: A Rare Native Tree Worth Knowing Meet the hybrid locust (Robinia ×longiloba), a fascinating native tree that’s flying under the radar in most gardening circles. This perennial woody wonder represents nature’s own plant breeding experiment – a natural hybrid that calls the southeastern United States home. What Makes ...

Hybrid Locust: A Rare Native Tree Worth Knowing

Meet the hybrid locust (Robinia ×longiloba), a fascinating native tree that’s flying under the radar in most gardening circles. This perennial woody wonder represents nature’s own plant breeding experiment – a natural hybrid that calls the southeastern United States home.

What Makes Hybrid Locust Special

The hybrid locust is a true tree, typically growing taller than 13-16 feet with a single trunk, though environmental conditions can sometimes encourage a more multi-stemmed, shorter growth form. As a native species to the lower 48 states, it has earned its place in the natural landscape through centuries of adaptation.

Where You’ll Find It Growing Wild

This tree has a pretty exclusive address – you’ll only find hybrid locust growing naturally in North Carolina and South Carolina. Its limited native range makes it a special find for gardeners in these southeastern states who want to cultivate truly local species.

The Mystery Plant Dilemma

Here’s where things get a bit tricky for eager gardeners: hybrid locust is somewhat of an enigma in the horticultural world. While we know it’s a legitimate native species, detailed information about its specific growing requirements, wildlife benefits, and garden performance is surprisingly scarce. This isn’t necessarily a bad thing – it just means you might be pioneering its use in cultivation!

Should You Plant Hybrid Locust?

If you’re gardening in North Carolina or South Carolina and stumble upon this native tree, here are some considerations:

  • It’s definitely native to your region, which is always a plus for supporting local ecosystems
  • As a perennial tree, it offers long-term structure to your landscape
  • Its rarity in cultivation could make it a unique conversation starter
  • Limited availability might make sourcing difficult

Growing Tips (What We Know)

Since specific cultivation information for hybrid locust is limited, your best bet is to mimic its natural habitat conditions. Being a southeastern native, it likely appreciates:

  • Well-draining soil
  • Full to partial sun exposure
  • Regional climate conditions typical of the Carolinas

If you’re considering adding this tree to your landscape, try contacting local native plant societies or botanical gardens in North Carolina or South Carolina – they might have more specific insights about cultivation requirements.

Alternatives to Consider

If hybrid locust proves too elusive or challenging to source, consider other native Robinia species like black locust (Robinia pseudoacacia) or bristly locust (Robinia hispida), which are more widely available and have well-documented growing requirements. These related species can provide similar benefits with more established cultivation knowledge.

The Bottom Line

Hybrid locust represents an intriguing opportunity for adventurous native plant gardeners in the Carolinas. While it may not be the easiest tree to research or source, its native status and unique character make it worth considering if you can find responsibly sourced material. Just be prepared to do a bit of experimenting – you might just become one of the first to document its garden performance!

Hybrid Locust

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

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Robinia L. - locust

Species

Robinia ×longiloba Ashe (pro sp.) [hispida × viscosa] - hybrid locust

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