Strain starting to canoe any ideas?

Looks to me like light/heat stress.other causes can be wind burn or to to many nutrients.

That looks to me like the light is too close.

What size tent is it and what temperature humidity is it day/night? If only we knew. Looks like humidity vpd probably, I see you have a few lights and plants,those figures would help to know, as it could be as simple as environment 👍

Your diary doesn't give us any information on how much water they're getting but canoeing is often due to overwatering. You also haven't said what your temps are and this could also be causing the canoeing but not the discoloration. There's no information on the pH level you're maintaining and that could have an effect on the absorption of nutes which could be the cause of the discoloration and the canoeing ... which brings us to your nutes... I'm going to preface these comments by saying I'm ONLY going to talk about the plant in SOIL... I do not know about growing in Coco so you're going to have to research that or extrapolate from these comments... It's quite a conglomeration of stuff and at least two of the Fox Farm elements are being WAY over-used. Grow Big should be cut out completely - plants in flower don't need a whole lot of nitrogen and Grow Big has a VERY potent nitrogen content (the most I ever use of Grow Big is 1 tsp and that in veg state only!) ... your plants will get all the nitrogen they need from the Tiger Bloom (2tsp of that is a good amount). If a plant has too much nitrogen, it can cause a calcium lock out - so you can drench your soil in calcium but if there's too much nitrogen or your pH isn't in a good spot (6.0-6.5 for soil, 5.5-6.3 for coco - so make sure BOTH have a pH of 6.3 to make your life easier), your plant is not going to be able to absorb it... I think you're also using far too much Big Bloom! Now, I love Big Bloom - I feed that to my grows throughout their lives. At the peak, I use 9 tablespoons per gallon although I've seen other people use as much as 12... but not 24-25! The rest of the stuff you're giving her is all quite perplexing - my motto is KISS... Keep It Simple Stupid... but if you've got a REASON to use the other stuff, by all means use it! I DO have a couple of other things I use (Terpinator and ReCharge and CalMag once in a while) so I can't tell you that what YOU'RE using is wrong... I can only suggest you make sure you want and NEED to use it. Life will be much easier if it's simple! I guess if this was my grow, I'd accept the canoeing at least for a little while I attack the nute issues. I would personally do a hard flush (9 gallons of 6.3pH'd water through the SOIL pot) adding just the Fox Farm to the last gallon but in these amounts: 4-5tsp BB, 1tsp TB, and MAYBE 1/2 tsp CalMag. Let the SOIL dry out before resuming your normal water/feed/water/feed schedule. Each time you want to water/feed, make sure the SOIL is completely dry... and make sure the pH is between 6.0 and 6.3 (for both the soil and the coco)... Good luck!