Aquatic Plants and Algae
Information on pond management and aquatic plants, including identification, chemical or biological control of aquatic plants and harmful algae blooms. Tips on invasive species, such as European water chestnut, pondweeds, filamentous algae.
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ArticlesFilamentous Algae
Different species of filamentous algae exist, but all have a similar growth habit. These algae begin growth in the winter and early spring on the pond bottom. -
ArticlesEurasian Water Milfoil
Eurasian Milfoil is an invasive, nonnative plant with long stems, often reaching the surface, with feather-like leaves in whorls of 4 or 5 around the stem. -
ArticlesPlanktonic Algae
Planktonic algae floats in the water column and can sometimes be confused with muddy water. It causes the water to look green, brown, or reddish in color. -
ArticlesAquatic/Wetland Noxious Weed List
The links below provide a listing of aquatic or wetland plants considered to be noxious weeds by the federal government or Pennsylvania. -
ArticlesStrategies for Preventing Algae and Aquatic Plant Problems in Farm Ponds
Over half of Pennsylvania pond owners have reported having issues with overabundant aquatic plants and algae. This article outlines several strategies for preventing nuisance algae and aquatic plant problems in farm ponds. -
ArticlesAlgae in Pennsylvania Ponds
This common aquatic plant is a part of many Pennsylvania pond ecosystems. -
ArticlesMid-Atlantic Pocket Guide to Water Garden Species
This information is intended to help select native aquatic plant alternatives and avoid invasive plant species. This guide is intended as a portable reference. -
ArticlesControlling Nuisance Aquatic Plants and Algae in Farm Ponds
Unwanted, overabundant aquatic plant and algae growth is one of the most common management issues pond owners face. -
NewsEuropean Water Chestnut Range Expands to 15 Pennsylvania Counties
Date Posted 6/3/2024This invasive aquatic plant was previously reported in only eleven northwestern and eastern Pennsylvania counties. -
ArticlesGuide for Completing the State Application for Aquatic Herbicide Use
Tips to help rural property owners complete DEP’s application for use of algaecides or herbicides in private ponds in Pennsylvania. -
VideosPhysical Control of Aquatic Plants
Length 4:23There are a variety of physical control strategies that can be employed. Physically harvesting aquatic plants can have a positive, long-lasting effect. -
ArticlesFacts About Aquatic Invasive Species and Water Gardens
A water garden is fundamentally an outdoor aquarium. The gardener needs to manage the pH, nutrients, and organisms introduced into the system. -
ArticlesManagement of Fish Ponds in Pennsylvania
General information on all aspects of pond construction and maintenance for building a new pond or taking care of an existing pond used for swimming, irrigation, fishing, or other activities. -
ArticlesPenn State Extension Resources for Pond and Lake Owners
Penn State Extension has many written and video resources to help with the proper management of ponds and lakes. -
ArticlesPond Algae: It's Not All Bad!
Late summer brings questions to Penn State Extension from pond owners about nuisance algae growth. -
ArticlesMosquito Fern in Pennsylvania Ponds
Mosquito fern is a Pennsylvania native waterfern that can be a nuisance in your pond. -
WebinarsFree
Protecting Dogs and Animals from Harmful Algae Blooms
When Watch NowRecorded Jul 23, 2020Event Format On-Demand | RecordedLearn about harmful algae blooms and their possible toxins during this live webinar. -
NewsSlow the Spread of Aquatic Invasive Species
Date Posted 4/9/2020As you paddle on a local lake or cast a rod in a nearby stream, remember to take appropriate precautions necessary to slow the spread of aquatic invasive species (AIS). -
Master Watershed Stewards Program
The Master Watershed Steward Program provides extensive training in watershed management to volunteers who, in return, educate the community about watershed stewardship based on university research and recommendations. -
Master Well Owners Network (MWON)
The Master Well Owner Network is a network of trained volunteers dedicated to promoting the proper construction and maintenance of private water systems in Pennsylvania and throughout the Mid-Atlantic Region. -
Online Courses$99.00
Pond Management for Rural and Farm Pond Owners
Sections 6Length 8 hoursLearn basic pond maintenance and how to address common pond issues including excessive plant and algae growth, nuisance wildlife, and fishery management. -
Online Courses$59.00
Aquatic Pesticide Management: Using Aquatic Herbicides for Pond Weeds and Algae
Sections 3Length 3 hoursManage nuisance pond plant and algae growth. Learn about measurements, plant identification and control methods using an integrated pest management approach. Earn 3 Category 9 or 3 Private Category credits and a certificate of completion. -
Guides and Publications$4.00Management of Aquatic Plants
Understand the importance and benefits of aquatic plants, and learn how to manage them in your pond. -
Guides and Publications$11.00A Field Guide to Common Aquatic Plants of Pennsylvania
Identify and manage the aquatic plants growing in your pond.
