Grape leaves should turn YELLOW or maybe a little ORANGE, but definitely never RED! Red leaves are always a sign of a problem. Red leaves can be caused by viruses, bacteria, fungus, nutrient, deficiency, cold injury, and damage to root systems, etc.! if you have red leaves on your grape vines, give Van Winden’s Garden Center a call and we can help you out. 💙🍇 #winecountry #napavalley #gardening #grapevine