Little bit of leaf tip burn on our potted Pickering, Haden and Coconut Cream. Definitely hard to surmise what may be the cause. Wind, water logged, salts, chlorine, over fert, nutrient deficiency, etc..
We use Osmocote plus and a little foliar feed now & then. Once in a while water from the hose. I did order the Boogie Blue Plus for a little peace of mind when having to hose water.
Not sure if I should just do nothing and see how it plays out or run the risk of overthinking and wind up doing too much and possibly make things worse.
I thought about adding some gypsum to remedy any salt build up, add a little calcium and possibly aid in drainage.
So many variables when container growing. Wish I could just put them in the ground. I feel like it would make life easier.