GM Guys

So I been a bit stressed lately because my Skywalker OG is 2 months old now in comparison to my GSC/Animal Crackers which are only 1-1/2 month old, yet seem to be growing at a much more rapid pace. They all have been in 5gal fabric pots since the transplant. More importantly, I also noticed the leaves on my Skywalker and one of my GSC have been getting WRINKLY with BURNT TIPS. Please Help

1st Pic Skywalker
2nd GSC

Medium
Nutes
Water schedule
pH
Etc etc etc