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How to Start a Rain Garden: A Step-by-Step Guide to Creating a Sustainable Oasis

Updated: Nov 26

Are you looking for a way to beautify your yard while also benefiting the environment? A rain garden might be the perfect solution! Rain gardens are not only gorgeous but also eco-friendly, designed to absorb and filter stormwater runoff, reducing the amount of water that flows into storm drains and helping to prevent pollution in nearby waterways. Here’s a simple guide to help you get started on your very own rain garden.


Eastern Tiger Swallowtail on Milkweed in a Rain Garden
Eastern Tiger Swallowtail on Milkweed


What is a Rain Garden?

A rain garden is a shallow, bowl-shaped garden planted with native plants that can tolerate both dry and wet conditions. It’s strategically placed in your yard to collect rainwater runoff from roofs, driveways, and other hard surfaces, allowing the water to soak into the ground instead of contributing to stormwater issues.


Benefits of a Rain Garden

  • Reduces flooding and erosion by capturing stormwater and allowing it to absorb naturally.

  • Filters pollutants from runoff before they reach local waterways.

  • Attracts beneficial wildlife, such as pollinators like butterflies and bees, and even birds.

  • Low-maintenance once established, especially when planted with native species.


Step-by-Step Guide to Starting Your Rain Garden


1. Choose the Right Location

Start by selecting a low spot in your yard where water naturally flows or pools after a rain. You want to place the rain garden at least 10 feet away from your house to avoid any foundation issues. Avoid areas where water already stands for long periods, as this may indicate poor drainage.


Tip: Pay attention to how rainwater flows during a storm to identify the best spot.


2. Determine the Size and Shape

The size of your rain garden will depend on the amount of runoff you need to manage and the space available in your yard. A good rule of thumb is to make the garden about 20% of the size of the area draining into it. It should also be between 4-8 inches deep to effectively capture runoff.


Shape it creatively! Your rain garden doesn’t need to be a perfect circle or square – let it flow naturally with the landscape.



Brick rain garden boarder with native plant spiderwort
Get Creative with your Rain Garden Boarders


3. Test Your Soil

You’ll need well-draining soil for your rain garden to work efficiently. To test your soil, dig a hole about 8 inches deep and fill it with water. If the water drains within 24 hours, you’re good to go. If it doesn’t, you may need to amend your soil with compost or sand.


4. Excavate and Grade the Site

Once you’ve planned the location and size, it’s time to dig! Remove the top layer of grass and soil, making the center of the garden deeper than the edges. Create a gentle slope to direct water into the garden.

You can also use any excavated soil to create a berm (a small raised barrier) on the lower side of the garden to help keep water contained.


5. Choose Native Plants

Native plants are the best option for rain gardens because they are adapted to the local climate and soil. Look for plants that can handle both wet and dry conditions. Some great options include:


  • Cardinal Flower (Lobelia cardinalis)

  • Blue Flag Iris (Iris versicolor)

  • Joe-Pye Weed (Eutrochium purpureum)

  • Swamp Milkweed (Asclepias incarnata)

  • Black-Eyed Susan (Rudbeckia hirta)


Plant taller species in the middle and shorter ones around the edges for a natural look. Native grasses like switchgrass or little bluestem also make great additions.


6. Mulch and Water

After planting, cover the area with a 2-3 inch layer of mulch to help retain moisture and prevent weeds. Shredded hardwood mulch works well and gives a polished look to your rain garden.

Water the plants regularly for the first few weeks until they are well established. After that, your rain garden will mostly take care of itself, only needing occasional watering during dry spells.


7. Maintain Your Rain Garden

Rain gardens are low-maintenance, but they do require some care. Remove weeds as they appear, and check the mulch layer annually to replenish it if necessary. Prune any dead growth at the end of the season to keep your garden healthy and thriving.


Final Thoughts

Starting a rain garden is a beautiful way to make your landscape more sustainable. It not only helps manage stormwater runoff but also adds biodiversity and visual appeal to your yard. Plus, once your garden is established, you’ll have a peaceful oasis that supports your local environment with minimal effort. Ready to dig in? Happy gardening!


Check out one of my Rain Garden's Below



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