I understand that you can finish a plant with an all purpose fertilizer like Miracle Gro. I'm in it for profit though bro tbh. I know that you're pleased with your results, but until you compare your yields with Jack's to something that's more fine tuned to Cannabis, you might just have the wool pulled over your eyes. At least give the girls some Calcium supplements since Jack's has none. It's a really crucial micronutrient and I'm sure that adding it to your feed will increase yield and quality. I live in Humboldt, and growing weed is life. I'm not dogging on you, but if maximizing yields and quality was as easy as giving your girls one thing throughout their whole life cycle, their wouldn't be such a thing as professional horticulturists. I could live off of protein shakes if I wanted to, but that doesn't mean it's the best nutrient lineup for me! Trust science. Try harder. Give your girls everything that they need when they need it. Start with Calcium. You have to wipe the crust out of your eyes and realize that Jack's all purpose is chemically almost exactly the same as Miracle Gro. Look at the ingredients man.