How do I properly feed my plants?

First of all - open sesame / beastie / cha ching are Bloom Supplements - not designed for general feeding.

If anything you should be on very basic GRO Big feed. That nute ( their veg nute ) has all of the elements needed upfront.

IMO stop using the 3 you are using which is used wrong right from the start. Originally you dhould purchased the TRIO - Gro Big / Tiger bloom / Big bloom ( the only organic of the 3 and for microbial life in medium. )

Also take FF feed schedule with a grain of salt.
Those concentrations of feed are extreme and under normal grows not even required. That feed schedule reflects the max they threw at some test grow ….. not yours.

When i used to run the crap - one would start 1/4 to 1/2 strength to gauge what your plant is responding to. Be Aware that this nute line salts up your shit quickly - because of its heavy concentration and improper use.

Later on you will find easier , less headache inducing nutes to run instead of fox farm nutes.

Do you have pics. ?