Dry Creeks
In addition to rainwater runoff functionality, a dry creek can serve as a focal point and/or draw the eye to a view.
A variety of rocks creates a natural look. Here, large flat boulders do double duty as focal points and stepping stones in the creek.
A well-designed dry creek looks like it has always been there.
This creek carries water from the roof and driveway down to a side yard, and also serves as a path to a flagstone patio.
How to build a dry creek
Dig out your water course (the functional part of the dry creek) at a depth of 4-6” and width of 2-4’ - width is more important than depth here. Test that the watercourse follows the contour by running a hose from the top of the dry creek. Does the water flow downhill? If so you’re ready to move to the next step.
Don’t use landscape fabric or weed barrier underneath the water course. Landscape fabric can inhibit water infiltration and compact the soil- the opposite of what you want. A functioning dry creek should slow down the flow of water and allow water to infiltrate.
Fill the center of the watercourse with “washed” river rocks of different sizes. These can be purchased at stone yards in bags or in bulk. For the banks of the creek use a mix of river rocks, rough stones, and boulders. A variety of stones creates a natural effect.
Lay out the creek in a curving, meandering path, both to the slow down the water and to make the creek look natural. Plant the banks of the creek with low-growing groundcovers and bulbs.
Mark the outline of your creek with marking paint to help guide you in digging.
Plant the banks of the creek with low-growing groundcovers, bulbs, and perennials.
Closeup of the succulent berm.
Test your creek before filling with river rock by running the hose at the location of the downspout. Does the water run downhill?
While most plants within a dry creek should be tolerant of periodic inundation, you can get creative and expand your plant palette by playing with elevation. Here, a small berm creates a space for a succulent rock garden.