She doesn’t use EB’s! I’ve only done 2 runs back to back cuz by then the soil is a ginormous mass of roots! U can prob do more then 2 runs if u only run 1 plant in it! And a junior is 1/2 a cubic foot of soil that they hold! You’re supposed to fill the box and then mound the soil up like 4-6” over the top of box but EB claim the junior holds 1cu ft but that size bag of soil fill 2 boxes up to the top but not enough to mound it up like they recommend! The main reason I ignore them and don’t mound it up from the start is you are left with no room to topdress anything during the grow if soil is piled up that high!