For an outdoor grow or guerilla grow I would use synthetic time released frets. To me the only place for organic notes is in your backyard, they are definatly not for indoor use on a plant that will flower for 70 days or less,I've grown organic and synthetic outdoors and the synthetic beats it every time,defiantly in the yield department,and no I do not think that u can taste the fertizer in the plants because I never noticed it,so for me it's the same quality with better yields. It takes time for the soil life to break down the organic nutes to where the plant can uptake the NPk,where as with synthetics the food is immediately available to the plants. Another big reason to stay away from the organics are that the animals will certainly try to dig up your plants looking for food and carrying in all of those heavy bags of organic nutrients will also leave a trail to your plots,but that's just me. I know I'm going to get slammed for this statement but it is what works for mean and friends of mine, by the way,plants only take up the NPk and trace elements that the fertilizer provides,they have no idea wether it is organic or inorganic,don't get caught up on organic growing those are just old hippie wise tales,,and are people in legal med states where they can tend they're plants daily