i use the liquids at half strength and the solubles at 1/8 tsp per gallon. every other or every 3rd watering. i also feed with diluted strength also once mixed i water it down even more. i found that when i started using the solubles at 1/2 tsp. per gallon my leaf tips burned.
start out slow and see how they respond. i use sunshine mix for my grow medium.
and this schedule but at reduced strength.
http://www.foxfarmfertilizer.com/soilfeed.pdf