im on day 21 of flower now(week 3), and I have been using iguana juice bloom, and started using big bud at week 2. Unfortunately I was a little over zealous and burned my girls. I started at half strength with the big bud, and was 3/4 strength iguana juice(started with 1/2). This was too much for my girls, I have since cut back to 1/4 strength on both, and will increase slowly throughout flower. With the 1/4 strength dose, my girls are showing vast improvement over even a week ago, and from previous grows without the new nutes(clones from previous grow). so Thats 3/4 tablespoon of iguana juice per gallon of water, and 1/4 tablespoon of big bud. Right now I feed then straight water, feed...water...I will continue this untill week 6 and cut out big bud. I love making mistakes, its the best way to learn.