How much root stimulator do you need to plant a 45 gallon tree?

One cupful is the quantity of root stimulator that you need to plant a 45-gallon tree.

Specifically, 45-gallon trees may range in size from 8 feet (2.4384 meters) upwards. That is the point at which one full cup is given. This rule holds best for evergreens. But in terms of deciduous trees, one-third cup per inch (2.54 centimeters) of trunk caliper may be a wise guideline.