PRICES MAY VARY. Healthy Planting Ideas: 15 gallon potato growing bags set include 3x black & 3x green grow bags, designed to promote better air circulation and drainage than what your plants could receive in the ground. This results in healthier, stronger roots, and improved drainage that keeps your potatoes safe and strong during rainstorms. Easy Mobility: Grow Bags for growing potatoes have 3 sturdy handles. With these handles reinforced by sewing, the planter bags are convenient to move arou