Fall
Rake or sweep up fallen leaves, twigs, grass clippings, and dirt from driveways, sidewalks, and street gutters before using a hose or waiting for rain to wash them away.
Late winter
Walk your sidewalks, steps, and driveway with a stiff broom and a dustpan to collect any visible, undissolved salt grains.
Spring
For established lawns, choose a fertilizer labeled phosphorus-free. For gardens, use a soil test to find out what nutrients are needed. Follow the label’s application rate, and don’t apply before rain.
Summer
Remove leaves, grass clippings, and loose dirt from street storm sewer grates near your property after every rainstorm, wearing gloves and bagging the debris for the trash.