Yellowing Leave's Tips, overfert?

I find that when I use nitrogen fertilizers in the ammonium form (NH4) I tend to get tip burn. This is something I see all over the place with anyone using organic N sources as well. If you're making a mix try to stick to a 10:1 NO3:NH4 ratio. This is the ratio most commonly used in large greenhouse operations. In a very good microbially rich environment the bacteria will have first crack at NH4 and they will convert it first to NO2 then NO3. Calcium nitrate is an excellent N source for Cannabis. Although this late into flowering I'd be getting back most of the N regardless. I disagree with previous answers about not being able to over-fertilize. It may not be obvious at first but more is definitely not better, balanced is the target. Good luck.

with biobizz it´s nearly impossible to overfeed - especially if you add algamix and bioheaven according to the feeding scheme - and give good light. sometimes in the end of the grow i reduce grow-nute for 20% and dimm the lamp +10% when the leaves get dark green, some burned tips aren´t a big huzzle. I see 29°C at the bottom, maybe it´s too hot? (and too humid with 70%). do you water correctly (not too much)? Peace man!

Bro it looks super healthy. Just give a healthy dose of phd water. The damage is very minor as long as you fix it. Ph at 6.5 for 2 or 3 waters and next time you add nutes, be a hair lighter. Your fine , good job 💪👌💨

Bro it looks super healthy. Just give a healthy dose of phd water. The damage is very minor as long as you fix it. Ph at 6.5 for 2 or 3 waters and next time you add nutes, be a hair lighter. Your fine , good job 💪👌💨