hey there! i have tthe same thing happening on my outdoor plant too. basically its just the normal things that happen when you have an outdoor plant. Just be super careful outdoor with bugs, check especially under the leaves for signs of pest. get up in there on the flowers to make sure the bud lice don t make a home in there. i see you're using kelp; that's cool i do too, but the thing is it changes your PH, so what happens is every time you add that the PH is off which can cause fluctuations and cause the same sort of symptoms that you're seeing. Dial in that PH and you wont see any new leaves being effected.