Try these expert and homeowner-tested solutions to common backyard landscape problems—eroding slopes, a shady lawn, wet soil, bad soil, mushrooms and swampy areas.
Photo courtesy of EnergyScapes
A stone creek bed channels rainwater.
Photo courtesy of Carolyn Rogers
Problem: “Our beautiful backyard slope was washing down onto our patio with every rain. It was only a matter of time before the whole hill came tumbling down.”
Reader Solution: “We built a dry creek bed on the slope, and it fills dramatically during a rainstorm. It's a beautiful addition to our landscape, and it seems to be solving our erosion problem.” Carolyn Rogers
“A dry creek bed can work well to control erosion,” says landscape architect Susan Jacobson, “if there's a place for the water to go such as a sandy area somewhere else on your property.” In its simplest form, a dry creek bed is simply a gully or trough filled with rocks that directs the flow of water to prevent erosion. To control larger volumes of water, pin landscape fabric in the gully and mortar the rocks into place. Constructing the creek bed with rocks of several different sizes gives it a natural look and maximizes its water-carrying abilities.
But Jacobson says building a dry creek bed won't work in every situation. “You'll create a bigger problem (and a potentially illegal situation) if you direct the water into the street or into your neighbor's yard. And if the slope is too steep, you might just end up with the rocks tumbling down the hill as well.”
To control erosion on a steep slope or when there's no reasonable place for the water to flow, consider these suggestions:
A combination of shade-tolerant plants and garden paths fills in a shady, barren area where grass wouldn't grow.
Photo courtesy of Bob Rogers
Problem: “My wife wanted grass, so I tried to grow it many times over the years. But thanks to the heavy shade cast by our oak trees, by mid-summer our backyard consisted of small, lonely tufts of grass surrounded by bare earth.”
Reader Solution: “My solution was to till most of the backyard (when my wife was gone for the day) and create a shade garden. Now that poor, sad grass is just a dim memory, and so far, the garden looks great.” Bob Rogers
A shade garden can be a beautiful way to deal with mature trees. However, planting a garden at the base of a tree can be challenging for both the plants and the tree. Shade isn't the only issue: “The plants will also need to cope with dry soil and root competition,” says Doris Taylor, a plant information specialist at the Morton Arboretum near Chicago. “And many trees are sensitive to having their roots disturbed.” Taylor offers these suggestions for planting a successful shade garden without harming trees:
Heavy clay soil—mushy and sticky when wet, hard as concrete when dry.
Photo courtesy of Sue Blackburn
Mixing in expanded shale loosens and aerates the soil.
Photo courtesy of Sue Blackburn
Problem: “Our clay soil is mush when wet and like concrete when dry, and nothing will grow in it.”
Reader Solution: “We're in the process of amending our soil with expanded shale. It's a gravel-size rock that's pumped full of air. It aerates heavy clay soil, which makes it easier to work and helps it drain better. I've already noticed that the part of the garden we've done drained much better than the rest of the garden during the last rain.” Sue Blackburn
Sue has definitely done her research. According to Steve George, a horticulturist at the Texas Cooperative Extension service, your clay soil can benefit from expanded shale if it's heavy and sticky when wet “and gets deep cracks when it's dry in the summer.” Plants don't grow well in clay soil because they don't get enough oxygen. Expanded shale creates cavities in the soil to hold both air and water. George recommends adding 3 in. of 1/4-in. to 3/8-in. shale, along with 3 in. of compost and tilling them into your soil 6 to 8 in. deep. Then cover your garden bed with a 3-in. layer of mulch.
The good news about expanded shale is that unlike other amendments such as compost or fertilizer, you only need to add the shale to your garden beds once. After that, you'll never need to add compost or commercial fertilizer again. The bad news is that expanded shale costs more than compost (about $10 for a 40-lb. bag; slightly less if you buy it in bulk). But according to George, it's worth it. “Using expanded shale is just so much better. It makes it fun to garden in clay.”
One of many types of mushrooms that can grow in lawns.
Photo courtesy of Eric Lucas
Problem: “We have so many mushrooms in our lawn that they make the weeds seem easy to control. We must have six different kinds, and they're worst after it rains. We've got a dog and grandkids, and those mushrooms are not only disgusting, but I'm worried someone's going to eat one.”
Reader Solution: Elusive. “We've tried using fungicides, but they're expensive, they require twice-weekly applications and you need to treat every single mushroom. If you miss even one application, the mushrooms come back and you need to start over again. We're not sure what to do.” Eric Lucas
We have good news and bad news for you, Eric. The good news, according to University of Minnesota turf expert Bob Mugaas, is that while mushrooms can look unsightly (and they're worse in years with a lot of rain), they're actually beneficial to your lawn. “They're part of the breakdown of organic material in the soil, and they help recycle nutrients.”
The bad news, as you've already discovered, is that mushrooms are nearly impossible to get rid of. They're actually the fruit of an extensive underground root system. So even if you remove the visible mushrooms or use fungicides, the source of them is still there (they're like the tip of an iceberg).
According to Mugaas, you have several options. “You can certainly pull them.” This won't permanently rid your lawn of mushrooms, but it can give you temporary relief.
You can also make your lawn less hospitable to fungi by correcting drainage problems and eliminating decaying organic matter. Grind down stumps, rake up grass clippings, dig up buried lumber, aerate, dethatch and replace old mulch.
The easiest option (or maybe the hardest for you, Eric) is to make peace with your mushrooms. Their numbers will increase and decrease depending on the season. Teach your grandchildren never to eat mushrooms from the lawn, and during cool, wet periods, keep a close eye on your pets.
Convert a low, wet area to a rain garden with water-tolerant plants.
Photo courtesy of EnergyScapes
Problem: “I have a low spot in my yard that fills with runoff from our downspouts during rainstorms. It's not a constant problem, but it's a bear to grow grass there.”
Reader Solution: None yet. Help! Alena Gust
Alena, if you have workable soil (not clay), a rain garden is an easy and effective solution for a short-term, isolated drainage problem. “Building a rain garden means you don't have to fight a losing battle to grow turf,” says Douglas Owens-Pike, plant ecologist and owner of EnergyScapes, a Minneapolis landscape design firm. “It's also a great way to treat rainfall as a resource rather than a problem.”
All you need is a shallow depression (which it sounds like you already have) that has the soil amended so it drains quickly. Make sure your rain garden is located at least 10 ft. from your foundation so you won't have any seepage problems in your basement. Plant it with shrubs and perennials that tolerate pooling water as well as periods of drought (type “rain garden” into your online browser and you'll find tons of plant lists). The amended soil and water-loving plants capture the excess water, and it slowly percolates into the earth instead of running into the storm sewer or sitting on the surface of your lawn.
And according to Owens-Pike, rain gardens aren't limited to flowers or areas with full sun. “Partially shaded areas planted with lower-growing trees and shrubs can create wonderful wildlife habitat rain gardens that become perfect nesting areas for birds.” (For detailed instructions for building a rain garden, type “rain garden.” in the search box above.)
A French drain around the corner of the house doubles as a path.
Photo courtesy of Nora Spencer
Downspout leads flow into the French drain which channels water away from the house.
Photo courtesy of Nora Spencer
Problem: “Our house is at the bottom of a slope, and every time we had a hard rain, everything became a muddy mess. We got water in the crawl space and in the basement. We couldn't grow anything since it all just got washed away…our backyard was like a wasteland.”
Reader Solution: “We built a French drain gravel walkway lined by decorative brick. The digging wasn't easy on my husband and stepsons, but during the first hard rain after we installed it, we all got our slickers on and went outside. There was nothing more beautiful than all that water gushing out the end of the drainpipe, and not a drop of it went into our crawl space or basement. We have a lawn and a garden now—and a beautiful gravel path.” Nora Spencer
“This is a creative solution for controlling a lot of water invisibly,” says landscape architect Susan Jacobson. A French drain is similar to a dry creek bed, except the water flows underground through a drainpipe enclosed in a gravel-filled trench. It's effective because water flows through gravel much more quickly than through soil. The water migrates into the trench and flows out of a drain at its end point. The net effect, says Jacobson, is that your lot dries out. “Again, this solution works well if you have a place to dump the water safely such as a sandy area or a side yard that slopes away from your foundation.”
If you don't have a place for the water to go, she suggests creating a small holding pond that actually takes advantage of the excess water. “The idea,” says Jacobson, “is to work with the natural features of your yard rather than against them.” If building a pond isn't an option, an alternative is to build a dry well. This is essentially a holding tank for large water runoff that slowly drains itself into the surrounding soil. (For step-by-step instructions for building a dry well, search for “yard drainage.”)
Do you have water in your basement? Type “wet basement” in the search box above for DIY solutions.