rain garden

New Rain Garden at Windham Extension Center

rain garden appCourtesy of the Eastern Connecticut Conservation District, the Master Gardeners of  Windham county installed a small rain garden at the Windham Extension office in June. We discussed and referenced the printed and online reference resources available from UConn.
If you would like a refresher on rain gardens- info can be found here https://nemo.uconn.edu/raingardens/. Sizing info for rain gardens is here https://nemo.uconn.edu/raingardens/sizemap.htm You can click on the map and create an area….well you can check out the website and read the instructions
And don’t forget you can also download the Rain Garden app from UConn: https://nemo.uconn.edu/tools/app/raingarden.htm
As part of the Eastern Connecticut Conservation Districts plan to install 100 rain gardens in Northeastern Connecticut, we are very lucky to be awarded one of these. See the article from the Hartford Courant- https://www.courant.com/community/pomfret/hc-pk-pomfret-1004-rain-gardens-and-barrels-20181002-story.html

Stormwater Corps: Looking for Green Stormwater Opportunities

stormwater corps collage
If you were out and about in the towns of North Haven, Milford, Hamden, West Haven or Cheshire this summer, you may have seen a team of four young adults writing on clipboards, snapping pictures of parking lots, laying their phones down on the sidewalk, and peering down into storm drains. These four intrepid UConn undergrads, nicknamed the Stormwater Corps, were evaluating opportunities for “disconnecting” stormwater through the use of green stormwater infrastructure (GSI) practices such as rain gardens, bioswales, and pervious pavements. Such practices help to infiltrate stormwater runoff into the ground, reducing flooding and water pollution. The students, trained by CLEAR’s water (NEMO) team, were tasked with using a combination of online mapping technology and good old-fashioned field work to look for “low-hanging fruit”­­-sites in each town where green stormwater practices were likely to be most feasible, have the greatest impact, and be cost-effective. Their findings were compiled into town reports complete with aerial photos and stormwater reduction estimates, and presented by the team to key municipal staff in each town with an emphasis on the “top five” potential sites. The Stormwater Corps project, supported by a grant from the Long Island Sound Futures Fund of theNational Fish and Wildlife Foundation, includes funds for each of the five towns to put toward construction of their top priority GSI practice. CLEAR’s long-range goal is to combine a semester-long stormwater/GSI class with the work with the towns, forming a fully realized third “Corps” program to add to the Climate Corps and Brownfields Corps.
Questions should be directed to:
Michael Dietz
NEMO Program Co-Director 

michael.dietz@uconn.edu  or (860) 345-5225

Install a Rain Garden This Spring

rain garden appWhat is a Rain Garden?

A rain garden is a depression (about 6 inches deep) that collects stormwater runoff from a roof, driveway or yard and allows it to infiltrate into the ground. Rain gardens are typically planted with shrubs and perennials (natives are ideal), and can be colorful, landscaped areas in your yard.

Why a Rain Garden?

Every time it rains, water runs off impervious surfaces such as roofs, driveways, roads and parking lots, collecting pollutants along the way. This runoff has been cited by the United States Environmental Protection Agency as a major source of pollution to our nation’s waterways. By building a rain garden at your home, you can reduce the amount of pollutants that leave your yard and enter nearby lakes, streams and ponds.

Learn more, and use our app or resources to install a rain garden on your property.

Build a Rain Garden

raingarden app smartphone Hartford rain garden

Want to build a beautiful garden that also helps to protect local waterways? Let the NEMO Rain Garden App show you how.

Spring means the urge to create gardens.  Spring also means rain and polluted runoff flowing into the street, down the storm drain, and into the local brook or wetland.  Why not solve both problems in one fell swoop, and build a “rain garden” that helps to soak in the runoff from your roof, driveway or patio?

CLEAR’s NEMO Program has aFREE smart phone app with all the information you need, including sections on locating, sizing, building and planting your rain garden.  It’s available for both iOS and Android systems, and takes no time at all to download.  The iOS version includes CT plus 12 other states (!?)

PS: No smart phone?  No problem.  All the same information and tools are on the NEMO Rain Garden website.

Bringing Some Green to Our Big Cities

By Michael Dietz, UConn Extension

When people think of Hartford and New Haven, “green” may not be the first thing that jumps to mind. However, recent efforts of the UConn Extension Nonpoint Education for Municipal Officials (NEMO) program are helping to make these cities a little bit greener, both figuratively and literally. This past June, NEMO partnered with Neighborhood Housing Services of New Haven and Community Solutions of Hartford to perform rain garden trainings at each location. Both of these organizations are dedicated to enhancing the lives of inner city residents through educational workshops and community organizing.

These trainings were targeted at local landscape contractors and community residents, and consisted of a morning classroom session paired with an afternoon hands-on rain garden installation. In the classroom session, participants learned how to site, size, install, and maintain a residential rain garden. Cutting edge tools including web resources and a smartphone app created by the UConn Extension NEMO team are highlighted in the training. The hands on session is critical to help reinforce concepts learned in the classroom, and to teach participants how to overcome real-world problems. The UConn Extension NEMO program continues to perform trainings like this that have a tangible benefit to both the waters of our state, and to the residents that live here. Several participants in the New Haven training were from a local halfway house, and they came to the training to obtain new potential job skills. One participant in particular expressed the value of this training to help him find a niche in the growing green-collar job market.

As a result of the rain gardens installed at these two workshops, 61,000 gallons of runoff from 1,920 square feet of urban rooftops will be kept out of the sewer system annually. Since the goal is to train others to install more gardens, this effect should grow as more rain gardens are installed around the state.

Hartford rain garden New Haven rain garden

Is It Time for a Rain Garden?

Jraingarden appen McGuinness who blogs at Frau Zinnie wrote an excellent blog post about the rain garden presentation Dr. Mike Dietz of UConn Extension presented at the Master Gardener Symposium in March. In Jen’s words:

MANCHESTER, Conn. – With April showers imminent, you’ll soon be reminded of how much stormwater leaves your property. Water rushing through gutters and down driveways will find its way to the street’s sewer if you don’t have a way to trap it.

Instead of letting stormwater wash away, create a rain garden to keep it on site.

At the 2013 Connecticut Master Garden Association’s Symposium, Michael Dietz, Ph.D, NEMOprogram director and water resources educator, explained how a rain garden can be installed. The benefits can be clearly seen in densely populated (and paved) cities.

“Older cities have a runoff problem,” said Dietz. “The sewage and runoff from the house combine and overload the sewer treatment plants. If it’s overloaded, it goes into the rivers.”

Read more….

Rain Got You In A Depression? Put It In One!


With historic amounts of rain falling on our state this month, it is easy to get a little down. It puts a damper on beach days, picnics, and hikes. Not to make things worse, but did you also know that as all that rain runs off roofs, parking lots, driveways, and roads and into storm drains it carries pollutants directly into our streams, ponds, lakes, and Long Island Sound?

Well don’t fret – you can turn that frown upside down. Install a rain garden! Rain gardens are depressions in your landscape that are designed to soak up stormwater rather than send it into the storm drain. In addition to adding beauty to your yard, rain gardens remove pollutants from stormwater runoff and help keep our water bodies safe for swimming, drinking, and fishing.

Rain garden installed with help from UConn’s app.

Rain gardens are fairly easy to install for the average DIYer, but you need to know how to design and install them properly. Lucky for you, UConn has just released the Android version of its award-winning Rain Garden smartphone app (previously available only for iPhones).  Through a variety of videos, tools, and information, the app walks you through how to properly site, size, design, and install a rain garden.

So stop bumming about your cancelled beach day and start planning your garden (a great thing to do on a rainy day). And the next time it rains, won’t it feel good to look at your yard and smile knowing you’ve done your part to protect your local water body?

NEMO Monitoring Project Looks At Nitrogen Processing Through “Bioretention”

By Chet Arnold

In January, CLEAR’s NEMO Program broke ground on a new monitoring project focused on the Low Impact Development (LID) practice of bioretention. Bioretention is the practice of reducing the quantity, and increasing the quality, of runoff by directing it to a depression filled with plants. This is the same concept as the more widely recognized rain garden, which is just a small bioretention area with a little less engineering and a much sexier name.

The project, funded by the federal/state partnership Long Island Sound Study, is located on the agricultural half of the UConn campus. The bioretention cell (heretofore called “cell” because bioretention is hard to type) is about 500 square feet in size, and drains an area of pavement about 10,000 square feet. Impervious surfaces like pavement and rooftops prevent percolation of rainfall into the soil, creating storm water runoff and its associated problems of flooding, erosion and pollution. As can be seen in the photos, the cell is planted with a three different types of native plants (about 120 in this case), which help to reduce the volume of runoff through evapotranspiration (last time we’ll use that word) and process pollutants through biological uptake.


The project is to monitor how effective the cell is at removing nitrogen (N), a common nutrient that can cause a number of health and environmental problems when overabundant in drinking and surface waters. N pollution has been demonstrated to be a major driver of the problem of low oxygen levels in Long Island Sound, sometimes called hypoxia. Because of this, the entire lower Long Island Sound watershed, which includes almost all of Connecticut, is subject to a federal/state Clean Water Act provision that creates an allowable “budget” for N entering the Sound. This research will help determine if LID strategies like bioretention can help meet this budget.


The cell will be monitored for one year. If you want to know more, contact The Bioretention Man, Dr. Mike Dietz of CLEAR/NEMO.

New Rain Garden Smartphone App Helps Protect Water Quality

By:  Sheila Foran, UConn Today & David Dickson, UConn Extension

The Center for Land Use Education and Research (CLEAR), a partnership between Extension and  NRE in the College of Agriculture and Natural Resources and CT Sea Grant, has developed the Rain Garden smart phone app in Apple’s iTunes store. It is the University’s first mobile app geared toward the public.  Landscapers, contractors, and homeowners can use the app to design, install, and maintain rain gardens.

raingarden app

A rain garden is a depression (about 6 inches deep) that collects storm water runoff from a roof, driveway, or yard and allows it to infiltrate into the ground. Rain gardens are typically planted with shrubs and perennials and can add colorful, landscaped areas to yards and office or school complexes. In addition to being attractive, they benefit the environment by preventing erosion, filtering runoff pollution, removing standing water, and creating a habitat for birds and butterflies.

David Dickson, Assistant Co-op Extension Educator in Residence in the Department of Extension, says, “I started thinking that the contractors and landscapers we [CLEAR] work with probably have smart phones with them at all times … their trucks and their phones are what they use for an office … and I thought it would be great if they had a reference right there to help them with planning and laying out the gardens.”


Dickson talked it over with Mike Dietz, Assistant Co-op Extension Educator in Residence, and Chet Arnold, Cooperative Extension Educator, both in the Department of Extension, and the idea began to take shape.

While many extension programs around the country, including UConn, have focused on training landscapers and others on proper rain garden design and installation, this training often involves classroom instruction and guidebooks or printed presentation material. UConn’s utilization of a mobile app is revolutionary. Mike O’Neill, Associate Dean for Extension and Outreach in CANR says, “The folks at CLEAR are not just being innovative locally. This app has national implications. In the future, this is how knowledge will be delivered.”

While Dickson, Dietz, and Arnold knew that they wanted to include everything from basic information about rain gardens to tips on picking a site, suggestions for native plants, and soil drainage maps, they didn’t have the background to actually design the app.

That’s how Ph.D. student Alberto De La Rosa Algarin came into the picture. Algarin, who is studying information security in the Department of Computer Science and Engineering, was approached by his advisor, Professor Steve Demurjian. When asked if he’d like to collaborate with a couple of master’s level students in the design of the app, Algarin was quick to say yes. “I thought it would be a good problem-solving exercise,” he says. ”Even though it wasn’t directly tied to my research, I thought it would be a good opportunity to learn something new.”

“I didn’t know anything about rain gardens until I started working on the app with Mike and David; it’s amazing they [rain gardens] are everywhere.  I had seen the garden on the roof of the classroom building [The Rowe Center for Undergraduate Education] but I hadn’t realized its importance.”

In its final phase, the app includes sections on how to actually install a garden, plant selection guidelines focusing on native plants, drainage charts, and information on how to pick a site and size of garden. This information is available right down to the location of individual addresses, making planning specific to a plot of land, not just a general area.

Landscapers will find the app particularly useful because the ‘My Rain Garden’ section actually allows users to design and organize multiple gardens.  On an individual basis, homeowners can search for plants that will particularly enhance their landscapes, as well as providing individual notifications to remind them about watering and plant care.

An added benefit to CLEAR is that when users export key information about their gardens to the Department of Extension, the staff will be able  to quantify storm water volume treated by the gardens in the state, as well estimate pollutant load reductions.

The app is now available through Apple’s iTunes App Store as “Rain Garden.” In its first two weeks of release it had already been downloaded 682 times. The team is now working on a version for Android devices and hopes to have it available in the next few months and hopes to release a national version of the app soon – it currently is focused primarily on Southern New England.

In the words of O’Neill, “These guys [from CLEAR] are creating a whole new path for how Cooperative Extension is going to look in the 21st century; that’s what’s so cool about this app. Everyone with an interest in rain gardens benefits and it sets the stage for the future.”