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Top-Rated Landscapers in Washington - Updated Nov 2026

Avatar for Adam Exterior Design
Adam Exterior Design
New to Angi
Designer - LandscapeLandscape - Soil, Sand, Mulch and Rock DeliveryLandscape Curbing - Install+1 more

Serving Washington, IA and surrounding areas

Approved

In business since 2020

Free estimates

Small jobs welcome

Adam Exterior Design is here to make your home and yard look it's best with curb appeal. From landscaping design to decorating your garden to bringing the spark back out of your home. We have you covered. We work efficiently with your plans in mind to ensure your happiness with the result every time. We also love putting our input in to open up options. We look forward to hearing from you. Give us a call today!

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Landscaping FAQs, answered by experts

In addition to aloe vera and lilac, other effective humidity-reducing plants include peace lilies, Boston ferns, English ivy, spider plants, and lucky bamboo. These plants thrive in humid environments and can naturally lower moisture levels. Place them in areas prone to dampness for the best results.

Since you’ll likely be digging a trench to install your yard drainage system, this is a good time to complete other tasks that involve digging up your yard, including: Sprinkler system installation Lawn reseeding Regrading your yard Redesigning your landscaping If your drain is under a walkway or driveway, your contractor must also remove those materials. This is a great time to consider upgrading your hardscaping features, especially if they’re nearing the end of their life span.

How much 4 yards of dirt will cover depends on how deep you want the soil to be. In general, a yard of dirt will cover 324 square feet for a 1-inch depth or 100 square feet for a 3-inch depth. Therefore, you can expect 4 yards to cover between 400 and 1,296 square feet if you keep your soil depth between 1 and 3 inches.

The best size rock for your landscaping depends on the design, as different boulders serve different purposes. If you want to group boulders to create a natural-looking cluster, you’ll need a range of sizes. Otherwise, here are some suggestions:

  • Small boulders (smaller than 12 inches across): Best for landscape edging and fire pits 

  • Medium boulders (12–24 inches): Best for retaining walls and water features

  • Large boulders (more than 24 inches): Best as standalone landscaping features, steps, or walkways.

Of course, you can mix and match sizes to create a unique display.

If you choose to leave gaps between your pavers, you can grow some ground cover plants between them for an organic feel. Look for plants such as creeping thyme, dymondia, jewel mint of Corsica, or clover.

The Washington, IA homeowners’ guide to landscaping services

From average costs to expert advice, get all the answers you need to get your job done.