Deep turning can damage roots and bring weed seeds to the surface, where they germinate and add problems. Mulch Mulching, too, will go a long way toward reducing weeds' ability to take over. Organic mulches tend to cool the soil, as well as conserve soil moisture. Apply materials such as chipped or shredded bark, straw, hay, grass clippings or pine needles 2 to 4 inches deep. Replenish them as needed.
Plastic mulch tends to warm the soil.
It's best used on warm-season vegetables, such as tomatoes, melons, peppers and squash. If soil gets too hot in midsummer, put a shallow layer of organic mulch on top of the plastic. Pulling weeds Don't underestimate the effectiveness of pulling weeds. It's good for your plants and your figure, too. Young weeds can be very easy to pull, especially during or just after a rain.