Stock up on the Viagrow 10 gal. Plastic Round Nursery Pots. Round plastic nursery pots are inexpensive and durable perfect for many types of soil or hydroponic growing media. The raised rim design allows easy handling and easy stack ability when not in use. Can be reused indefinitely. Please note that our pots are measured in trade gallon. 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 0.71 U.S. liquid gallon. There are 20 grow bags included per order.