Question: what is a #1 pot?
Answer: What is #1 Pot Size? The gallon nursery containers, or #1 pots, are the most common nursery pot sizes used in the industry. While they normally only hold 3 quarts (3 L) of soil (using liquid measure), they are still considered to be 1-gallon pots. A variety of flowers, shrubs and trees can be found in this pot size.