Root crops—such as garlic, onions, beets, carrots, potatoes and turnips— need the support of soil that's rich in potassium and phosphorus. So we've packed Root Crops Alive! with these essential nutrients in just the right balance needed by root crops. And, unlike greensand-based fertilizers, the potassium in Root Crops Alive! is plant based, so root crops benefit immediately. Apply 2-3 lbs. per 100 sq. ft. when you prepare the soil, or side-dress when plants emerge to get greater coverage per pound. For best results, feed again in midseason.