On May 20, David Petersen and I participated on behalf of Tonkon Torp's Sustainability Law Practice in the West Linn-Wilsonville School District's Sustainability Showcase. While perusing the displays put up by the various businesses and local government agencies, I was able to pick up some useful information about water-wise gardening in the Pacific Northwest, including a great guide created by horticulture and conservation experts to assist the general gardener in making informed decisions about how to use water more efficiently in their landscapes. Following are some tips from this guide that I find very useful:
• The fact that most automatic irrigation timers are set to go off in the early mornings puts a great strain on water utilities, which must often super-size their facilities to meet early-morning water demand. A better time period for setting irrigation timers is during off-hours, i.e., between 11 pm and 5 am.
• A yard has numerous microclimates formed or affected by influences such as the house, balconies, rooftops, fences, walls, large rocks or trees, and paved surfaces. You can create a healthier landscape by selecting plants most suited to a particular microclimate.
• Only plant (or allow to remain, as the case may be) turf areas where grass is practical and functional. Good alternatives to grass are ground covers (particularly good for steep slopes where grass is hard to maintain and foot traffic is infrequent) and hardscape features such as pathways or patios.
• Only use organic mulch to cover the soil in your garden. Plastic mulches tend to increase soil temperatures and do not stimulate the activity of beneficial soil organisms that improve soil structure and biology.
• Last and certainly not least, water wisely: (i) water based on soil conditions and plant needs; (ii) water deeply but infrequently; (iii) use drip hoses instead of sprinklers; and (iv) water in accordance with the weather.
There are some beautiful water-efficient Demonstration Gardens in the Willamette Valley if you'd like to see what a water-wise garden looks like on the ground, including a 7,000 sq. ft. garden at Clackamas Community College and a 1.3 acre garden at the Tualatin Valley Water District.
Happy water wise gardening!
Post authored by Jeanette Schuster, attorney practicing in the Sustainability and Real Estate and Land Use Groups.