Growing "Greener" Grass
Advocates for sustainable gardening point out that lawn fertilizers, weed killers and gas-powered lawn mowers can be a significant source of water, air and noise pollution. And, over-watered lawns waste a precious resource.
With so many inherent risks of damage to the environment, many homeowners conclude that lawns are taboo if you garden sustainably. But we have found that if done right, we can have a lawn and still make good on our commitments to our families’ health and the environment.
When kids, families and pets need a soft place to play and relax, no other plant quite fits the bill as perfectly as turf grass. You just need to adopt some new practices to make lawns sustainable.
• Right-size your lawn for the purpose you want to achieve, such as to provide a play area for the kids and dog, or to create a little green oasis among beds of plants.
• Plant lawns where they grow best: full sun on well-draining soil. Choose other plants for shady, damp and sloped places.
• Adjust mowing height to leave grass blades 2½ to 3 inches tall. This lawn height also shades the soil surface reducing water evaporation.
• Convert to a mulching mower and let nutrient-rich clippings decompose and naturally “fertilize” the lawn. For smaller lawns, a rechargeable or an electric mulching mower will usually do the job just fine and will eliminate gas emissions.
• Water deeply, 1 inch once per week. It’s best to water once or twice weekly rather a little bit every day. This promotes growth of deep roots making the lawn more drought tolerant and a tougher, more resilient plant. It is important to water with 1 inch of water to keep moisture in the soil profile.
• Don’t spread weed and feed products on lawns. Why apply weed killers everywhere when you may only have a few weeds? Pull or spot treat weeds instead.
• Fertilize organically. Use compost to top dress lawns in April or May; use slow release organic nitrogen-based fertilizer and follow application rates as directed. The first number on any fertilizer bag is nitrogen, which lawns need to be replenished. The middle number is phosphorus and the third number is potash. Look for lawn fertilizers with a zero or very low number for the second number on the bag. For example, a 8-0-2 fertilizer would provide enough nitrogen for lawn needs and has no phosphorus to cause problems with our water ways.
• One of the most important cultural practices for good lawn growth and thickness is aeration and overseeding. Aerate and overseed lawns annually in spring or fall. Aeration will alleviate compaction and open up the soil profile to air and water. Overseed with a Northwest sun/shade blend of seed. Look for fine fescue and perennial rye grasses in the blend and always buy quality seed grown for our Northwest lawns.
Ladd Smith is a co-owner of In Harmony Sutainable Landscapes, which was founded on a shared passion for protecting the environment and a belief that it was not only possible, but essential, to offer environmentally responsible landscaping services. The company was the first business of its kind in the Puget Sound area to specialize in sustainable and eco-friendly practices for lawn and garden. Learn more at inharmony.com.






