Weird that they dont carry GH.. its by far the most widely used food on the planet! lol... Anywho.. sounds like you have a decent nutrient there.. anything that has 3 or 4 parts that you have to mix different amounts at different times should do you justice.. The main thing about these plants is that they require different amounts of nutes for different stages of growth.. stick with the formula recommended by the manufacturer for the first run or two.. and once you get a little more comfortable with how the plants respond.. you can start experimenting with higher dosages of food.. Cannabis can often handle 2-4 times the amount of nutes suggested in those basic feed charts... but condidtions need to be optimal (Temp, humidity, Co2, and lighting all has to be PERFECT), and you really need to watch your plants when increasing the feed like this.. it is VERY possible to have too much of a good thing! Sounds like your off to a good start.. good luck!