Clear the soil around your grape vines. Clear the area of weeds, rocks and sticks.
Water the soil generously. The mulch will hold the moisture in, which will help thirsty grape vines to grow.
Spread organic mulch (dry leaves, straw, grass clippings or wood chips) around your grape vines. Leave a circle an inch or two in diameter around the base of the vines. The mulch should be several inches thick, to keep the soil warm and eliminate competing weeds and grass.