Trade pot sizes
In general, the larger the # is, the larger the pot and, thus, the larger the plant will be. These container sizes range from #1, #2, #3 and #5 to #7, #10, #15 on up to #20 or higher. What is #1 Pot Size? The gallon nursery containers, or #1 pots, are the most common nursery pot sizes used in the industry. 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 gallons. More + Product Details Close 1/2 Gal. Nursery Pots with Saucers (10-Pack) Even indicating the pot's width, such as a 10-inch pot, doesn't tell you what the volume -- and therefore the potential root size -- of the pot is. One grower could use a taller 10-inch pot than another grower, resulting in different volume "10-inch" containers.