A typical soilless potting mix just like what is used for any potted plant works well for a rain gutter planter.
Rain gutter garden soil mix.
Remember that clay soil is not ideal as it inhibits drainage.
This system is relatively inexpensive and easy to build.
Pvc rain gutters will last indefinitely.
Ideally the water from your rain garden should drain within 12 hours or a within 24 hours at the most.
Plants are grown inside of large or small containers and fed water and nutrients from the rain gutter which is maintained by a float valve and connected to a well rain.
This length of time will ensure that mosquitoes will not breed in your rain garden.
At the core the rain gutter grow system is a self watering container gardening method.
If you have a long narrow garden space or a lot of vertical space to use rain gutter gardening is perfect for you.
Preparing for rain gutter gardening.
To prevent the soil from leaking through the drain holes cut a thin strip of weed fabric and lay it along the bottom of the gutter before adding the soil.
You may need to add compost to lighten the soil if you have heavy soil.
You can use plastic buckets barrels or grow bags for containers.
It is a low maintenance mass growing system that can grow many large and small crops at once.
The rain gutters you use for gardening need some preparation first.