While it's not the most glamorous of lawn care tips, tending to weeds regularly is essential for maintaining a healthy garden. Weeds spread quickly when the health of your grass is poor, so keeping your lawn in the best health will help to prevent weeds from growing. You can help to keep your lawn in the best possible health by regularly feeding it with a good quality lawn feed, or by applying a lawn treatment.It’s best to apply lawn feed when rain is forecast so that the fertilizer will spread down to the roots. If it doesn’t rain, you’ll need to water it into the grass.