Too Much N... need help

I got an abusive og kush medium size plant from a friend... Afrt over coming various pest and other nonsense, most likely related to the pant going from an indoor plant to.an outdoor. I have come across a difficult situation. My friend put it in miracle from moisture control which is something like 27 N, ie way too high. How can I fix it if the plant are in a soil which slowly leeches an excessive amount of time/moisture released nitrogen. Flowering is just now beginning hence why its become a noticeable issue. Any help greatly appreciated. I have picks but does not seem necessary since I know the problem but now how to fix it.

Uh, transplant it? Get it out of that Miracle Gro crap.

I used Miracle Grow Moisture Control soil once and I didn't have any problems. The complaints I've read about are how it tends to stay acidic, doesn't drain well and is easier to over water. If your climate is dry and hot, it might work out fine for you.

Is it ok to transfer a week and half into flower? Will that solve the issue if the root ball still has the miracle grow in it? I ve never transplanted an already flowering plant so I have no idea what will happen, don't want the stress to make it hermie.

This strain doesnt seem to big on nutes. It's showing all the signs of a nitrogen toxicity. It has hot and dry here its only the heavy dose of n the gives me qualms about miracle grow. Though I use happy frog for my indoor stuff, this plant came in a 3 gal cloth pot full of MG