by Sharon Morrisey, consumer horticulture agent for Milwaukee County
Research by University of Wisconsin turf specialists suggests new recommendations regarding summer fertility for lawns. An application of lawn fertilizer around the Fourth of July might be warranted.
This recommendation is made for:
- Lawns less than 15 years old
- Older lawns that have not been regularly fertilized for the last 15 years
- Lawns where the clippings are collected, rather than left on the ground
This summer application is in addition to fertilizing around Memorial Day and Labor Day. Each application should provide 3/4-1 pound of actual nitrogen per 1,000 square feet of lawn, but follow the manufacturer’s recommendations on the bag.
Fertilizer applications should be followed by watering or applied just before it rains.