Dry white or tan colored grass blade tips are an indication that the mower blade is dull. Dull mower blades tear turf grass and can lead to disease problems. Keep your blade sharp and leave the grass clippings where they lay. Grasscycling eliminates bagging labor and costs, adds organic matter and nitrogen to your soil and does not contribute to thatch build-up.
Sign up for the Sustainable Landscape Network's “Mow Right” Field Study here. For information about the study - click here.
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This NY Times article looks at this problems of keeping lawns green enough for the homeowners association during an ecomonic downturn. For the full article, click here.