I use primal harvest sometimes. I like it more than budswell. Its a 3rd of the price of budswell too. I use it for tea in late flower. I use 2 parts primal harvest, 1 part rainbow mix grow. Then early flower. 1 part rainbow mix grow , 2 parts rainbow mix bloom. That's all from earth juice. Then I add Dr. Earth seaweed concentrate for extra potassium bump. I swear I got more crystals from using earth juice guano's tahn i did with budswell.. You don't want to use primal by itself. Its just guano. The rainbow has everything else in it. Kelp meal, alfalfa meal, humic acid, etc. Or you could add all that individually.. Budswell is a mix of bat guano, bird guano and worm castings already, but they don't say how much of what. If you use that you still want to add kelp meal or seaweed extract.
also with budsell you use it in conjuction with green label too. on top[ what else you should add.
when I don't use the earth juice i use sun leaves guano, ancient forest, grow more kelp meal, grow more dolomite lime, and dr. earh seaweed extract.