Is there a nontoxic way to control...

The best nontoxic way to control white clover is to promote a healthy lawn. Weeds do best in low nutrient soil conditions, which mean their presence is a sign that your lawn is unhealthy. Clover has the ability to create its own nitrogen, allowing it to thrive in deficient soil. While considered a weed, clover can actually be beneficial to the lawn if kept from running rampant. Microclover is a special variety that does not flower as often as white clover. Microclover’s broad leaves shade the soil to limit weed growth, while its roots provide nitrogen to the surrounding grass. However, it’s important to control both microclover and white clover from growing out of control. Fertilize in the fall minimally: Too much fertilizer can build up toxic levels of nutrients and minerals in the soil and water. Apply 1 pound of nitrogen fertilizer per 1,000 square feet of lawn. Mow your lawn infrequently, keeping the grass at a height no shorter than 3 to 3 1/2 inches. Repeated mowing will stress the grass and give weeds a chance to flourish. Leave the grass cuttings on the lawn to fertilize the soil more slowly over the summer.