Sorry...maybe I'm just really high, :stoned: but how is flushing complicated? LOL

If you want to use a time release pre-ferted soil mix, be careful it's not too "hot"...I'm not familiar with that brand, but watch the NPK levels (should be clearly labeled on the bag)...also if you want to use additional nutes, you will HAVE to learn to read the plants and know when they've had enough...too much is not better! If you must add stuff, do it in a very diluted form, and watch the plants and how they react to it...if your going to do it this way, study and learn to recognize early signs of nute burn and other problems you may create...so if KISS is your motto, then actually keep it simple and if you re-pot on schedule, (didn't think about re-potting, did you?) and use pre-ferted soil, you shouldn't ever have to add anything, ever, as the plants do not stay in it long enough to use it up to begin with! If I were you, I would study up on transplanting and why it's done...you have time...Hope this helps! G/L!