North America Native Plant

Panama Crowngrass

Botanical name: Paspalum fimbriatum

USDA symbol: PAFI5

Life cycle: annual

Habit: grass

Native status: Non-native, reproduces and persists in the wild in Hawaii âš˜ Non-native, reproduces and persists in the wild in the lower 48 states âš˜ Non-native, reproduces and persists in the wild in Pacific Basin excluding Hawaii âš˜ Native to Puerto Rico âš˜ Native to the U.S. Virgin Islands  

Panama Crowngrass: A Tropical Grass Worth Knowing If you’re looking for a versatile grass that can handle both wet and dry conditions, you might want to get acquainted with Panama crowngrass (Paspalum fimbriatum). This adaptable little grass has been making itself at home in various warm climates, though it comes ...

Panama Crowngrass: A Tropical Grass Worth Knowing

If you’re looking for a versatile grass that can handle both wet and dry conditions, you might want to get acquainted with Panama crowngrass (Paspalum fimbriatum). This adaptable little grass has been making itself at home in various warm climates, though it comes with some important considerations for gardeners.

What Exactly Is Panama Crowngrass?

Panama crowngrass is a graminoid – that’s botanist speak for grass or grass-like plant. It can behave as either an annual or perennial depending on growing conditions, which makes it quite the chameleon in the plant world. This fine-textured grass produces delicate, feathery seed heads that give it an almost ethereal quality when they catch the light.

Where Does It Come From?

Here’s where things get interesting. Panama crowngrass is native to Puerto Rico and the U.S. Virgin Islands, making it a true Caribbean native. However, it has established itself as a non-native species in Florida, Hawaii, Guam, and other Pacific territories, where it reproduces on its own and tends to stick around.

The Good, The Bad, and The Neutral

Since Panama crowngrass isn’t classified as invasive or noxious (at least not officially), we won’t sound the alarm bells. However, if you’re passionate about native plants and supporting local ecosystems, you might want to consider native grass alternatives for your region instead. That said, this grass does offer some practical benefits:

  • Excellent for erosion control
  • Tolerates both wet and dry conditions
  • Provides seeds for birds
  • Creates habitat for small wildlife
  • Handles salt spray in coastal areas

Growing Conditions and Care

Panama crowngrass is pretty easygoing when it comes to growing conditions. It’s classified as facultative for wetlands, which means it’s equally happy in wet or dry spots – talk about flexible! This grass thrives in USDA hardiness zones 9-11, so it’s really only suitable for tropical and subtropical climates.

Perfect Spots for Panama Crowngrass

This grass works well in several landscape situations:

  • Coastal gardens where salt tolerance is crucial
  • Rain gardens or areas with variable moisture
  • Naturalized meadow-style plantings
  • Low-maintenance ground cover areas
  • Erosion-prone slopes

Planting and Care Tips

The beauty of Panama crowngrass lies in its low-maintenance nature. Once established, it pretty much takes care of itself. It can spread both by seed and through underground stems (rhizomes), so keep that in mind when planning your garden layout. Regular watering during establishment helps, but mature plants are quite drought tolerant.

Should You Plant It?

The answer depends on your gardening goals and location. If you live in zones 9-11 and need a tough, adaptable grass for challenging sites, Panama crowngrass could work for you. However, if supporting native ecosystems is your priority, research native grass species in your area first – you might find an equally tough native that provides even better wildlife benefits.

Remember, the best gardens work with nature rather than against it, so whatever grass you choose, make sure it fits both your landscape needs and your environmental values.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Atlantic and Gulf Coastal Plain

FAC

Facultative - Plants with this status can occur in wetlands and non-wetlands

Caribbean

FAC

Facultative - Plants with this status can occur in wetlands and non-wetlands

Hawaii

FAC

Facultative - Plants with this status can occur in wetlands and non-wetlands

Panama Crowngrass

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Cyperales

Family

Poaceae Barnhart - Grass family

Genus

Paspalum L. - crowngrass

Species

Paspalum fimbriatum Kunth - Panama crowngrass

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