Hi there. Just wondering what is all that brown/rusty/yellow tips of the leaves, or spots/dots on them started about day 50 i think. Is it some kind of deficiency (potassium?), or burn? Or is this just usual? I know as the plant getting older there is many more leaves turning yellow/brown with spots. But my DP AOB is at day 60 now. I think it was about day 52 when i spotted first signs similar to yours. It looks like nutrients burn. Got the brown tips, and start getting rusty/brown spots around margins/edges of leaves. I did read that leaves turn yellow between veins if there is potassium def, but my leaves look healthy and green.
Sorry if i bothered anyone with this post.