Is Your Yard September Ready?
Received a fantstic newsletter from Allen Wilson’s Garden and wanted to share some great bits of it. Take a look and find some great information as well as wonderful advice!
ALLEN WILSON’S GARDEN NEWSLETTER for the Pacific Northwest
September 2010, naturalpruningnw.com
REDUCE IRRIGATION FREQUENCY
Plant water use drops as the day length shortens and cooler temperatures return. The cloudy weather and natural rainfall also reduce irrigation needs. The best way to reduce water application is to lengthen the interval between irrigations. If you are irrigating every other day, increase the interval to 3 days. Sprinklers should run long enough so that water reaches several inches into the soil. This usually requires at least a half inch of water. You can determine how long to run you sprinklers by placing tuna fish or similar cans on the ground. Set the sprinklers for a time interval such as 30 minutes. Then measure how much water has accumulated. Drip irrigation systems have a much slower application rate. It may require several hours to apply a half inch. The best way to check depth of penetration is to open the soil with a
shovel a few hours after irrigation.
FERTILIZE YOUR LAWN WHEN RAIN RETURNS
Whether you have been irrigating your lawn this summer or not, the best time to apply fertilizer is mid September to late October as the fall rain returns. The shortening days and cooler temperatures stimulate grass growth. Grass root growth in particular is stimulated. Additional side shoots develop, making the lawn thicker. Fertilizer added during the next month or so just stimulates this process. It will also turn the grass a darker green color, usually within two days.
There are many good brands of lawn fertilizer. Some are specially formulated for fall application. Some are labeled as “winterizers”. These winterizers usually contain more potash or potassium. I still feel that the ideal balance for all lawn fertilizers is a 3-1-2 ratio of nitrogen/phosphorus/potassium. This could be 15-5-10 or 21-7-14 or similar percentages. I like to have at least part of the nitrogen from slow release sources, although this is less important for fall application. A fall fertilizer application will keep most lawns green for the entire winter.
Liquid lawn fertilization can be used, but it has a much shorter benefit period. We can apply long lasting granular fertilizer for the same or lower cost than most liquid lawn fertilizer companies.
IMPROVE YOUR LAWN BY OVERSEEDING
Lawns deteriorate in the Pacific Northwest as more and more native grasses invade our perennial ryegrass lawns. These grasses have a variety of textures and colors. Many of them go into dormancy in the hot summer no matter how much they are watered. That is part of the reason why some just give up and let their lawns go brown during the summer. One way to rejuvenate your lawn’s appearance is to over seed with ryegrass in the fall about the time the rainy season returns.
If you decide to over seed, be sure to scratch or loosen the soil surface so seed can come in direct contact with the soil. A thatch removal machine can be used to prepare the lawn for seeding. Adjust it so that the blades or tines scratch into the soil. Fertilize at the same time you plant the seed. Rake the seed into the soil leaving some showing on top. The most critical and important step is to keep the soil surface constantly wet for at least 3 weeks. A thin layer of bark dust, fine compost or peat moss will reduce the drying rate. Light sprinkling 3 times per day is needed during sunny, dry weather.
We can inspect your lawn free of charge to see if it would benefit from overseeding. We can also do the overseeding and fertilization at a very reasonable cost.
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