Mine get about 4 gallons every morning. Ended up with about 2 yards of extra organic mix from a big batch that I made for my mom this year so I decided to upsize from 65s. So happy I did, but again this is all organic so I rely heavily on the soil and top dressings. Have a friend that grew an 11’ tree in a 15 gallon pot using bottles, but they required multiple feedings daily.