False Locust (Hebestigma): A Mystery Tree You Probably Shouldn’t Plant
Ever heard of false locust? If you haven’t, you’re definitely not alone. Hebestigma, commonly known as false locust, is one of those plant mysteries that even seasoned gardeners and botanists scratch their heads over. While it sounds like it might be related to the familiar black locust tree, this perennial tree is actually quite different—and frankly, not your best bet for the garden.
What We Know (And What We Don’t)
Here’s the thing about false locust: we know surprisingly little about it. What we do know is that it’s a perennial tree that can grow quite tall—typically over 13 to 16 feet in height with a single trunk, though it might develop multiple stems or stay shorter under certain conditions. It’s currently found growing in Puerto Rico, where it’s established itself as a non-native species that reproduces on its own in the wild.
But that’s about where our knowledge hits a wall. The aesthetic appeal, specific growing requirements, wildlife benefits, and even basic care instructions for this plant remain largely undocumented. It’s like trying to solve a puzzle with half the pieces missing.
Geographic Distribution
False locust has been documented in Puerto Rico, where it grows as an introduced species that has naturalized in the wild environment.
Why This Isn’t Your Garden’s Best Friend
While false locust isn’t officially listed as invasive or noxious, there are several reasons why you might want to skip this mysterious tree for your landscape:
- Unknown behavior: Since we don’t know much about its growth habits, care needs, or potential impact on local ecosystems, planting it is a bit like playing botanical roulette
- Limited benefits: Without documented wildlife or pollinator benefits, you’re essentially planting a question mark
- Better alternatives exist: There are plenty of well-documented native trees that will provide known benefits to your local ecosystem
- Care challenges: How do you properly care for a plant when basic growing requirements are unknown?
Consider Native Alternatives Instead
Rather than gambling on false locust, consider these benefits of choosing well-documented native trees for your area:
- Known wildlife and pollinator benefits
- Established care requirements and growing conditions
- Adaptation to local climate and soil conditions
- Support for local ecosystems
- Predictable growth habits and mature size
Your local native plant society or extension office can recommend trees that will thrive in your specific region while providing tangible benefits to local wildlife and pollinators.
The Bottom Line
False locust remains one of botany’s mysteries—a tree that exists but about which we know frustratingly little. While it’s not necessarily harmful, the lack of information about its care, benefits, and long-term behavior makes it a poor choice for most gardeners. Instead of taking a chance on this botanical enigma, stick with native trees that come with a track record of success and known ecosystem benefits.
Sometimes the most gardening-savvy choice is simply saying thanks, but no thanks to the unknown and embracing the tried-and-true native options that will make both you and your local wildlife happy.
