Human: What is the most effective method of preventing weeds from growing in my garden? Assistant: 
The most effective way to prevent weeds from growing in your garden is to create a weed-free environment. This can be done by removing any existing weeds, tilling or rototilling the soil, and adding mulch or compost to help suppress the growth of new weeds. Additionally, you should regularly inspect your garden and remove any new seedlings before they have a chance to become established.