To kill clover without harming grass, you need to use selective methods or herbicides that target broadleaf weeds like clover while sparing the grass. Here are the most effective options:

• Selective Herbicides with Triclopyr: Herbicides containing triclopyr are effective at killing clover (a broadleaf weed) without damaging most types of grass. Products like T-Zone contain triclopyr and can kill clover with one application

• Corn Gluten Meal: This is a natural pre-emergent herbicide that prevents clover seeds from germinating by drying them out. It does not harm mature grass

• Chelated Iron (FeHEDTA): Herbicides containing chelated iron kill broadleaf weeds like clover through iron toxicity but do not harm grass; in fact, grass may even become greener. Multiple applications may be needed for full control

• Proper Lawn Care: Improving lawn health by fertilizing with nitrogen-rich fertilizer, mowing at the correct height, watering adequately, and aerating compacted soil can reduce clover's advantage and help grass outcompete clover naturally

• Non-chemical methods: Hand-pulling clover, smothering patches with black plastic to kill clover (and grass in that spot), and raking before mowing can help reduce clover without chemicals, though these methods are more labor-intensive

Avoid using non-selective herbicides like salt or vinegar, as they can kill both clover and grass and damage soil quality

. Also, some common herbicides like 2,4-D may injure grass and are less effective at killing clover completely

. In summary, the best way to kill clover but not grass is to use selective herbicides containing triclopyr, or natural options like corn gluten meal or chelated iron, combined with good lawn maintenance practices to keep grass healthy and competitive against clover