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The organization published a maintenance and winterization report to help lawn care professionals and homeowners protect their lawns.
Lawns with bare patches and other signs of wear should be reseeded while soil is still warm, according to the report.
“Lawns with poor density or bare areas going into winter will become infested with weeds if you do not add more turfgrass,” Alec Kowalewski of Oregon State University noted.
The report outlined these five steps to winterize lawns to come back strong next spring.
Rake. Use a straight rake to remove dead organic matter and loosen up the top half inch of soil.
Aerify. Even lawns that don’t need to be reseeded can benefit from aeration to “combat soil compaction and thatch buildup, and enable oxygen, water and nutrients to reach the grass’s roots more easily.”
Fertilize. Although nitrogen, phosphorus and potassium are important nutrients for cool-season grasses, new turf and established lawns need them in different proportions, according to the report. “If you’re reseeding, you’ll want to apply a starter fertilizer at the time of planting and then follow up with a standard fertilizer four to eight weeks after germination.”
Reseed. When selecting seed that will be suitable for a particular lawn, Cale Bigelow of Purdue University recommended checking seed labels for seed tested in the last six months with germination rates of 85% or better.
Water. Newly planted grass will need frequent light watering until the seeds germinate. Keep the top layer of soil damp, then reduce watering after germination, as temperatures decrease and days get shorter.
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Danielle Andrus was previously the managing editor for Colorado Builder, and is currently Editor for the Journal of Financial Planning.