Winter Fertilizer | From the Ground Up


Late summer and fall are the most important
times to apply fertilizer to your lawn. It will provide the plants with the reserves
they need to get an early start in the spring. The rapid flush of green growth in the spring
following a nitrogen fertilizer application makes your lawn look nice, but it quickly
uses up the reserves in the grass roots, which makes them less resistant to stressors and
disease during the summer. Applying high rates of nitrogen fertilizer
in the fall promotes rapid tissue growth which can increase your risk of snow mold. When applying fertilizer in the fall, typically
you’ll pick a fertilizer with a lower nitrogen rate and a little bit more phosphorus than
you might apply in the spring. The phosphorous helps with the plant root
development which will then allow the grass to get a faster start in the spring. Remember to follow the application rates recommended
on the fertilizer label. And if you are mulching your grass clippings
into your lawn, you should be able to reduce your fertilizer input by about one third. All fertilizer packages will have three numbers
on the front that will tell you the percentage of nitrogen, phosphorous and potassium in
the bag. Remember that a fall or late summer fertilizer
should have less nitrogen and more phosphorous and potassium. If you have any more fertilizer questions,
please contact your local county Extension office. For the University of Wyoming Extension, I’m
Caitlin Youngquist, and you’re watching From the Ground Up.

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