Monday, November 26, 2007

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Sustainable Landscapes

PLAN AND DESIGN: Begin by analyzing the site (sun/shade, slope, soil, wind, available moisture). Consider use and function (child play, vegetable production, wildlife habitat, rest, and meditation). Make a list of materials needed to create the landscape and use recycled materials if they are available locally. Consider climate and order areas for the benefit of sun or shade. Plant trees or vines to assist in temperature control. Take the time to identify problems and search for solutions.

SOILS: Consider soil composition, slope, and need for amendments. These factors help determine choice of plants and irrigation. Increasing humus content will improve most soils. Use recycled materials like redwood compost/city recycled compost, and plan to compost and recycle your own green wastes once the garden is installed. Mulch to slow evaporation and erosion, and to control weed growth. As mulch decomposes, it adds to the nutrient content of the soil.

PLANT SELECTION: When possible, use low water using plants. Group plants together according to water, sun/shade, and soil requirements. Minimize lawn areas as they are the most water intensive of plantings, and require additional fertilization and labor to mow. Leave clippings on the lawn or use as mulch. Choose plants that grow to an appropriate size to decrease need for pruning, and that resist pests and disease so less chemical controls are required. Look for organic methods of pest-disease control if problems develop.

IRRIGATION & WATER EFFICIENCY: Use drip irrigation whenever possible to irrigate individual plants. Use separate irrigation valves for each type of planting so individual scheduling is possible. Check and maintain the system regularly. Find ways to capture natural rainfall and consider use of greywater where allowed by municipality.

MAINTENANCE: Careful planning helps, but all landscapes require some maintenance. Prune carefully (and recycle clippings), mow lawns higher (and compost grass) water wisely and adjust according to weather patterns. Consider using slow release fertilizers (organic if possible) which reduce the possibility of runoff.

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