The small white pots are 7x7x9 (1.9 gallons), the large ones are 9x9x10 (3.5 gallons).
Sunshine #4 (or any peat base medium), 35-50% worm castings, high-N bat guano, kelp meal, alfalfa meal, azomite, mycorrhizae, dolomite lime. Sometimes I add a little Roots soil or Light Warrior.
I recently...