Cannery Grow is a type of spray in the Dog Man series. It is known for making things grow and was first introduced in Dog Man and Cat Kid. Then, in Dog Man: Lord of the FLEAS, the factory that makes Cannery Grow was destroyed. It is then mentioned in Dog Man: Mothering Heights by Kinney, stating they stopped making it because it was banned due to complaints, and the factory that made it got destroyed.
Its name is a a reference to Cannery Row, a novel by John Steinbeck.
In Dog Man and Cat Kid, Dippy says "Hi, Welcome to Cannery Glow!" This is not a typo, it was made purposely to show her low intelligence.