Stock up on the Viagrow 1 gal. Thick Plastic Grow Bags. Standard grow bags with fluted side walls and pre-punched drainage holes along the bottom. Thick plastic can be reused several times with sterilization. These grow bags are reversible with white on one side and black on the other. Please note that our pots are measured in trade gallons. A Trade gallon is a term used to denote the sizes of standard plant containers in horticultural industries. A trade gallon is equal to approximately .1 U. S. liquid gallons. Viagrow Nursery Grow Bags are Bisphenol-A (BPA) free and food safe, making them ideal for growing fruits and vegetables. Grow bags are made with 4 mil plastic making them super strong and durable. The grow bag's white exterior reflects light, keeping root area cooler than regular pots. Grow bags are made from 100% pure virgin plastic and come with pre-punched side and bottom drain holes for excellent drainage and aeration! 50 grow bags included per shipment.