Problem is-- with miracle grow slow release-- it isnt really 3-month feeding.. cuz you have no way of knowing how much your plant is using or what it may be lacking.. NEVER use pre-nuted soil!
YOU need to be able to control the amounts of N-P-K and Micronutes throughout the grow, because the plants needs change in different stages.
All flushing will do is pop more of the little MG capsules in the soil....
get a soil test kit---when you take the soil sample from the pot-- put it on a dish and sort thu it for any little yellow or tan beads and remove them (they'll throw off the reading)
This will tell you aproximately how much nutrients the miracle grow is releasing-- THEN you canget what you need to adjust it...
Also-,, trim the plant and give it some water with some cal-mag, or Microblast or other micronutrient solution.
If she's a big plant, the leaves may be dying from lack of light/air... trimming or tying is the solution to that one... but the nute issue WILL effect her ability to produce decent buds.
No need for revenge, just sit back and wait.
Those who have hurt you will screw eventually themselves; and if you are lucky, God will let you watch!
Through What we create- we are immortal.