I want to keep 10 donors in soil and want to make sure they will be ok. I used 1.5 gal pots and sta-green. I also used perlite. It says the soil feeds for 9 months. I am new to this so I have no idea about soil. Does that mean all I have to do is water for 9 months then after that just add nutes once a week or so? My plan is to do 3 grows per year indoors and one large outside.