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Case Study · Prince George's County, MD

A front-yard rain garden, eighteen months in.

What happens when a soggy patch of lawn becomes a working ecosystem.

Location
Prince George's County, MD · zone 7b
Scope
Design + Install
Footprint
~200 sq ft
Installed
Fall 2024
The problem

The front yard wasn't draining — it was puddling.

Every heavy rain, the same low spot turned into a shallow lake for a day or two.

Two downspouts from the front of the house emptied directly onto a slight depression in the lawn. The grass was thin and patchy from constant wet-feet, the soil was compacted, and runoff from the roof was making its way to the street instead of soaking in. It was both a functional and an ecological problem.

The fix was a system designed to welcome the water — slow it down, spread it out, let it soak in — and turn the worst spot in the yard into the most interesting one.

The build

Route the water. Excavate the basin. Plant the right things.

I worked with Greensmiths — an excellent local landscape contractor — to redirect the two front downspouts underground with 4″ PVC, daylighting into the rain garden. From there, we excavated a shallow basin — roughly 18″ deep at the center — graded so water spreads laterally rather than ponding in one place. The soil at the basin floor was amended with compost to balance drainage with moisture retention. (Greensmiths is a great crew — happy to put anyone in touch.)

During installation: trenching for PVC and excavating the basin
Just-planted view of the rain garden
A rain garden isn't a hole that holds water — it's a sponge that releases it.
Funding & partners
Build costs for this project were partially funded by the Prince George's County Rain Check Rebate program, with a matching grant from the local municipality. Both programs offer reimbursements to homeowners who install qualifying stormwater projects — and they're meaningfully underused. If you're considering a rain garden (step-by-step how-to here), conservation landscape, or related project on your own property, it's worth checking what's available where you live before you start.
Just planted

Day one looks small. Trust the process.

The rain garden the day after planting

A few honest words about new native plantings: they look modest the day they go in the ground, especially if you use cost-efficient sized plants. Most of the energy is going underground — root systems that will never be visible but are doing the real work.

I chose plants with three jobs: tolerate intermittent flooding at the basin floor, fill in fast on the slopes, and provide year-round structure so the garden never looks empty between bloom periods. Most are Mid-Atlantic natives; all were purchased at small sizes and therefore lower cost.

The mulch is shredded hardwood, two inches deep — enough to suppress weeds, not so much that it acts like a dam during big rains.

Eighteen months later

A working garden — and a working ecosystem.

This garden now handles our strongest storms and supports pollinators at the same time.

The plants have filled in. The basin holds water visibly during a storm and is dry a day or two later. No more standing water on the lawn. No more bare patches.

More quietly: it's become a small functioning habitat. Goldfinches eat the seedheads in fall. Bumblebees and butterflies find nectar and pollen throughout the year.

The rain garden eighteen months later, fully grown in
One year in
Eighteen months in
What's planted

Twelve species, one ecosystem.

The bottom of the basin tolerates flooding, and the garden provides color every month of the year.

Betula nigraRiver Birch
Viburnum dentatumSouthern Arrowwood
Cornus sericeaRed Osier Dogwood
Eupatorium fistulosumTall Joe Pye Weed
Liatris spicataBlazingstar
Rudbeckia fulgidaBlack-eyed Susan
Symphyotrichum novae-angliaeNew England Aster
Asclepias incarnataSwamp Milkweed
Panicum virgatumSwitchgrass
Mertensia virginicaVirginia Bluebells
Phlox subulataMoss Phlox
Narcissus & Allium spp.Daffodil & Allium mix
Curious what's possible at your place?

Rain garden, native border, full design — let's talk about it.

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