Fishgrass: A Rare Native Aquatic Plant for Specialized Water Gardens
If you’re passionate about native aquatic plants and looking for something truly unique, you might have stumbled across fishgrass (Cabomba haynesii). This lesser-known native plant is one of those botanical gems that doesn’t get much attention in gardening circles – and for good reason, as you’ll soon discover.
What Exactly Is Fishgrass?
Fishgrass, scientifically known as Cabomba haynesii, is a perennial aquatic plant native to the United States and Puerto Rico. It belongs to the water shield family and is classified as a forb – essentially a non-woody herbaceous plant that lacks the thick, secondary growth you’d see in shrubs and trees. You might also see it listed under the synonym Cabomba piauhyensis in some older botanical references.
Where Does Fishgrass Grow Naturally?
This native plant has a surprisingly limited natural range, found only in Florida and Puerto Rico. Its restricted distribution makes it quite special from a conservation standpoint, though this also means most gardeners won’t encounter it in their local native plant societies or nurseries.
- Species observed
- No observations
The Challenge with Growing Fishgrass
Here’s where things get tricky for eager native plant gardeners: there’s remarkably little documented information about successfully cultivating Cabomba haynesii. Unlike its more common cousin, Carolina fanwort, fishgrass remains somewhat of a mystery in horticultural circles.
What we do know is that it’s classified as an obligate wetland plant in the Caribbean region, meaning it almost always occurs in wetland environments. This tells us it needs consistently wet or aquatic conditions to thrive.
Is Fishgrass Right for Your Garden?
Given the limited information available about this species, fishgrass might not be the best choice for most home gardeners, even those with water features. Here’s what to consider:
- Very limited availability in the nursery trade
- Unclear cultivation requirements and care needs
- Restricted natural range suggests specific habitat needs
- Potential conservation concerns due to limited distribution
Better Native Alternatives
If you’re looking to add native aquatic plants to your water garden or pond, consider these better-documented alternatives that share similar habitats:
- Native water lilies (Nymphaea species)
- Arrowhead (Sagittaria species)
- Pickerelweed (Pontederia cordata)
- Wild celery (Vallisneria americana)
The Bottom Line
While fishgrass earns points for being a true native species, its rarity and the lack of cultivation information make it a challenging choice for home gardeners. If you’re determined to work with this species, your best bet is to connect with local botanists, native plant societies in Florida, or aquatic plant specialists who might have experience with rare Cabomba species.
For most water gardeners, focusing on well-documented native aquatic plants will give you a better chance of success while still supporting local ecosystems. Sometimes the most responsible thing we can do as gardeners is to appreciate rare plants in their natural habitats rather than attempting to cultivate them in our own spaces.