Remember too, that many seeds lie dormant in the soil for years, so prevention will not guarantee a weed free yard. Secondly, consider control methods. Mulching is effective in preventing weeds from growing in gardens. Mulch smothers weeds by depriving them of sunlight. Organic mulches such as grass clippings or compost are effective in improving the garden soil by increasing the amount of organic matter.
Wood chips can deplete soil nitrogen unless fertilizer is added.
If weeds still poke through the mulch or grow in your lawn, try elimination. Depending on the type and number of weeds, various approaches can be used. Many weeds can be removed effectively and safely by physical control methods such as hoeing or pulling. This usually works for a few dandelions or in vegetable gardens when weeds are small. Usually, they are easy to pull when mulch is used.