i have growen and flowered over 100 plants in my day. indoor and out door. from merical grow mishaps to promix. currently growing 8 plants under 520watts and im having no problems at all. tallest plant is about 3 foot from bottom of pot, begging to go into a 20-30gallon pot. im using pure farfard soils with an extreamly light 6month slow release fert. i know they are to be avoided but this one is premixed and comes with lime and phed to 7. after about a month i start using alaskin fish emultion 5-1-1- petters 4-16-8 strong start, superthrive, and rooting hormon depending on the plants needs/nut probs. seen em all and a combo of the above listed can clear up almost n e thing.