Plants are all about 5 inches.. I have them in solo cups the soil reaches about to half The Cup due to little amount of soil. Anyways back to the question. I want to know if It would be safe to use Miracle Gro Fert. (link below) Miracle-GroÂ® Water Soluble Azalea, Camellia, Rhododendron Plant Food - Scotts Miracle-Gro On My 2 1/2 Week Old Plants. How much Would I water Per Each Plant and How much would I mix Per Part? HELP IS GREATLY APPRECIATED!!!