Oldfield Grass: A Low-Maintenance Ground Cover for Warm Climate Gardens
If you’re looking for a no-fuss grass that can handle tough growing conditions, oldfield grass (Anthephora hermaphrodita) might just be the understated hero your landscape needs. This humble little grass doesn’t demand much attention, but it delivers reliable ground coverage where other plants might struggle.
What is Oldfield Grass?
Oldfield grass is a warm-season grass that can behave as either an annual or perennial depending on growing conditions. Don’t let its simple appearance fool you – this tough little plant has earned its place in challenging landscapes across the southern United States and Caribbean.
You might also see this grass listed under its former scientific name, Tripsacum hermaphrodita, but Anthephora hermaphrodita is the current accepted botanical name.
Where Does Oldfield Grass Grow?
This grass has an interesting geographic story. It’s native to Puerto Rico and the U.S. Virgin Islands, where it evolved to handle the challenges of tropical island life. However, it has also established itself in Florida and Hawaii, where it now grows and reproduces without human assistance.
Why Consider Oldfield Grass for Your Garden?
Here are some reasons why oldfield grass might work well in your landscape:
- Low maintenance: Once established, this grass pretty much takes care of itself
- Drought tolerant: Perfect for water-wise gardening in warm climates
- Erosion control: Its spreading habit helps stabilize soil on slopes or disturbed areas
- Heat tolerant: Thrives in hot, sunny conditions where other grasses might struggle
- Fine texture: Adds a delicate, naturalized look to informal landscapes
What Kind of Garden is Right for Oldfield Grass?
This isn’t the grass for a pristine lawn or formal garden border. Instead, oldfield grass shines in:
- Naturalized meadow areas
- Coastal gardens where salt tolerance is important
- Drought-tolerant landscape designs
- Areas needing erosion control
- Low-maintenance ground cover situations
Growing Conditions and Care
Climate: Oldfield grass thrives in USDA hardiness zones 9-11, making it suitable for subtropical and tropical regions.
Sunlight: This grass loves full sun and performs best with at least 6-8 hours of direct sunlight daily.
Soil: Well-draining soil is essential. Oldfield grass can handle poor soils and doesn’t need rich, fertile conditions to thrive.
Water: Once established, this grass is quite drought tolerant. Water regularly during establishment, then reduce frequency as the plant matures.
Planting and Care Tips
- Plant in spring after the last frost for best establishment
- Space plants appropriately to allow for natural spreading
- Water regularly for the first few weeks until roots establish
- Minimal fertilization needed – too much can actually make the grass less hardy
- Allow some areas to go to seed if you want natural reseeding
- Cut back annually if desired, though not strictly necessary
Important Considerations
If you’re gardening in Florida or Hawaii, keep in mind that oldfield grass is not native to your area, even though it has naturalized there. While it’s not currently listed as invasive, consider exploring native grass alternatives first. Your local extension office can recommend native grasses that provide similar benefits while supporting local ecosystems.
For gardeners in Puerto Rico and the U.S. Virgin Islands, this grass is a true native that can be an excellent choice for sustainable, low-maintenance landscaping.
The Bottom Line
Oldfield grass won’t win any beauty contests, but it’s the reliable friend of the grass world – always there when you need it, never causing trouble, and asking for very little in return. If you need ground coverage in a challenging spot and live in a warm climate, this understated grass might be exactly what your landscape needs.
Just remember to check with local native plant societies about indigenous alternatives in your area – your local wildlife will thank you for choosing plants that evolved right alongside them!
