my outside grows I start with a mix of compost ,promix,peet moss,vermiculite/perlite ,lime ,plant tone(organic fertilizer ). I fertilize if the plants are looking for something I do give the macro nute once a month and bloom when the ambient light is at 14 hours ,depending on the strain I will add pk boosters every watering . with amended soil you should be ok for a little while and the roots will search out nutes as well