Mac it all depends upon the type of dirt of sand you use. If there is alot of absorbant material (humus) besides dirt , it is absorbed quickly and rest of dirt might not have enough wax. Just plain sand takes the least. I start out with a quart of flaked wax to a gallon of dirt. Test it before doing more. You put water on it and see if it beads up. It should be darker color showing that it absorbed the wax. You can put less in next batch (gallon) and see if it repells the water. If you have just one source of dirt you can figure your wax to dirt ratio and mix and put in greenhouse. Black totes or black plastic works good... Make sure you dont have clumps and your wax is COOLED ALL THE WAY before putting into containers to store till season, AND store in cool place....
I saw alot of trappers buying flake wax fm Art. With this heat no one will ship becuase of melting in delivery truck.