With the amount of rainfall that occurs in Hawaii, erosion can destroy your landscaping and wash contaminants from the topsoil into the water supply. Fortunately, you can take erosion control measures to prevent these issues and beautify your yard.
3 Effective Erosion Control Strategies
If you have a steeper slope, terracing will help the water soak into the ground rather than running down the hill and carrying the topsoil with it. You can also plant on the steps to anchor the slope with roots.
Start at the bottom and create retaining walls that are less than two feet in height. Backfill the slope with crushed rock to encourage drainage, then fill the rest with soil. Materials such as timber, stone, and pavers can make beautiful walls for hardscaping features that are both attractive and functional.
2. Overseed the Lawn
Add extra seed to the lawn to fill in the bare patches and cover more ground. Overseeding the lawn increases root density to hold the topsoil and water securely in place. You can add other ground cover with roots at varying depths as well, like wildflowers, succulents, and bushes.
Baffles work best on slight slopes. Partially bury rows of stone or wood parallel to the slope to slow down rainwater as it flows. If you have a drain at the bottom of the hill, you can use the baffles to direct runoff toward it.
Hui Kū Maoli Ola Native Hawaiian Plant Specialists carries a wide selection of native plants that will help with your erosion control efforts. This plant nursery based in Kaneohe, HI, offers landscaping services for homes across Oahu. Check out their more than 100 different species of native Hawaiian plants on their website, or call (808) 235-6165 to schedule a consultation.