The best time to apply weed and feed is generally in early spring and again in early fall, when the grass is actively growing and temperatures are between 60°F and 90°F. In spring, apply it around the time of the first lawn trim, once weeds start appearing but before they become well established. In fall, apply it to tackle late-season weeds and prepare your lawn for winter. Some key tips include:

• Apply on a mild, windless day with no rain forecast for 24-72 hours.
• The best time of day is early morning or late afternoon/early evening.
• For new lawns, wait until the grass has been mowed at least 2-3 times before applying.
• Do not apply more than twice a year, leaving 30 to 60 days between applications.
• Avoid applying before heavy rain to prevent wash-off.
• Follow specific product instructions on the label.

This timing ensures that the herbicide effectively controls weeds while the fertilizer nourishes the grass for optimal growth.