The National
Hydrilla verticillata Resource
Learn how to identify, understand, and manage Hydrilla verticillata. A comprehensive guide for lake managers, anglers, and property owners.
Hydrilla.org is an online educational resource available nationwide 24/7 for property owners, lake managers, researchers, agencies, and aquatic plant management professionals.
1. What Is Hydrilla?
Understand the biology, life cycle, and rapid growth mechanisms of the world's most aggressive aquatic weed.
Learn the Biology →2. Identification
Learn how to distinguish Hydrilla from native look-alikes like Elodea and Egeria using key leaf and root characteristics.
View ID Guide →3. The Impact
Discover how hydrilla damages lake ecosystems, alters fish populations, and devastates local waterfront economies.
See the Damage →4. Chemical Control
Review the latest aquatic herbicides, application rates, and strategies for targeting tubers and large infestations.
Explore Treatments →5. Mechanical Removal
Explore mechanical harvesting, diver-assisted suction, and physical removal options for lakes and ponds.
Removal Options →6. State Distribution
Track the spread of monoecious and dioecious strains across the US, with specific data for affected states.
View the Map →7. Hydrilla FAQ
Get quick answers to the most common questions regarding identification, safety, and eradication of Hydrilla verticillata.
Read the FAQs →8. Scientific References
Access statistical data, economic damage reports, and historical timelines regarding the spread of hydrilla.
View Research Hub →Need Professional Help?
Hydrilla is rarely something a property owner can handle alone. If your lake, pond, or marina is choked with weeds, connect with certified aquatic management professionals.
Professional services available for lakes, retention ponds, and canal systems nationwide.