What I would do is look up their feeding chart and then drop that to 1/4 and start feeding from there . Every strain uses a different amount some like more nutrients and some like less. Every product is different in the amounts as well . A couple tools you will need is a ph meter and a ppm meter . The ppm meter is used to tell you how much your feeding it so if your feed is 1000 ppm and your small amount of run off is 100 or 250 then the plant is using almost all the nutrients . If you feed it 1000 ppm and the run off is 800 then you need to back the feed down . If you have any questions about this come chat with me . My ppm meter broke about 30 days ago and I finally replaced it and checked my run off and I am in flower and was feeding 1400 ppm to my big plant . My run off was at 3400 ppm that's way way to highand the soil is holding some nutrients . Hope this helps. Oh and soil or medium will act differently as well that will make a difference too.