Fingergrass: A Tropical Grass with Complex Roots
Meet fingergrass (Eustachys), a perennial grass that’s got gardeners scratching their heads about its origins. This grass family member has a bit of an identity crisis when it comes to where it truly belongs, making it one of those plants that keeps botanists on their toes.
What Exactly is Fingergrass?
Fingergrass belongs to the grass family (Poaceae) and grows as a perennial, meaning it’ll stick around year after year once established. Like other grasses, it has that characteristic grass-like appearance that most of us can spot from a mile away. Think clumping growth habit with the typical narrow leaves that grasses are famous for.
The Geographic Puzzle
Here’s where things get interesting with fingergrass. This plant has a complicated relationship with different parts of the United States. It’s considered native to Puerto Rico and the U.S. Virgin Islands – these are its true homes where it evolved naturally. However, it’s also found growing wild in many other states including Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, New Jersey, New York, North Carolina, Pennsylvania, South Carolina, and Texas, plus several Pacific territories.
In Hawaii and other Pacific Basin locations (excluding Hawaii), fingergrass is considered non-native but has established itself and reproduces without human help. Its status in the lower 48 states is less clear, which adds to the mystery surrounding this adaptable grass.
Should You Plant Fingergrass?
The decision to plant fingergrass depends largely on where you’re gardening and what you’re trying to achieve. Since its native status varies dramatically by location, you’ll want to consider a few factors:
- If you’re in Puerto Rico or the U.S. Virgin Islands, you’re working with a true native that belongs in your landscape
- If you’re elsewhere, you might want to explore native grass alternatives that are better suited to your local ecosystem
- Consider the plant’s ability to self-seed and establish – this could be a plus or minus depending on your garden goals
Growing Fingergrass Successfully
While specific growing information for the entire Eustachys genus is limited, these grasses generally prefer:
- Warm climates – they’re happiest in tropical and subtropical conditions
- Well-draining soil, though they can adapt to various soil types
- Full sun to partial shade
- Regular watering during establishment, then moderate water needs
As with most grasses, fingergrass is likely to be relatively low-maintenance once established. The exact USDA hardiness zones will depend on the specific species you’re working with, but expect it to prefer warmer zones.
Landscape Role and Design Ideas
Fingergrass can serve several purposes in the right garden setting:
- Ground cover in naturalized areas
- Coastal gardens where salt tolerance might be needed
- Mixed grass plantings for texture and movement
- Wildlife gardens where seed-producing grasses provide food sources
The Bottom Line
Fingergrass presents an interesting case study in plant geography and garden decision-making. While it’s a perfectly fine grass that can serve useful purposes in the landscape, its complex native status means you’ll want to do your homework before planting. If you’re outside its native range of Puerto Rico and the U.S. Virgin Islands, consider exploring native grass alternatives that will better support your local ecosystem while providing similar benefits.
Remember, the best gardens work with nature rather than against it, so choosing plants that naturally belong in your area is usually the path to both gardening success and ecological responsibility.
