Assuming it’s heat stress, tips burnt and canoei...

more than one thng causes leaf symptoms. they are no 'discrete.' The more info you ahve at your hands to eliminate possibilities, the easier and more confidently you can diagnose and react correctly. leaf symptom charts help, but understanding the relationships between the various elements of nutrition, pH and even climate / light provided can drastically impact how you need to feed a plant. This could be high P, too. Or, lockout of K from high CA or. .. or... or... Bet there are 3-5 potential causes just for the symtpom of burnt tips around margins.

Yeah, likely more than one thing going on here - low k and heat. the low k visible symptoms could have more than 1 cause and would need more info to eliminate possibilities. overwatering is the boogeyman of people that refuse to take simple instructions. 1) water entire volume - never leave dry pockets. never half-water.. never spritz the top. 2) wait for appropriate dryback for that substrate and context. 3) repeat. it's the simples thing you have to learn and impossible to fuck up if the substrate is properly constituted. with soilless you get 10% runoff waste water or more out the bottom. with soil you only want excess runoff if trying to dilute the concentration present in substrate. A little runoff ensures it is fully saturated. over-watering is not adding too much water. there is no such thing. If your plant droops from saturating the entire volume of substrate, then it is the fault of how that substrate is constituted. Add more drainage amendments next time and it won't happen. that's a self-inflicted problem and not an effect of proper watering habits. it's a boogeyman people like to use to not admit to their own mistakes, imo. it's too simple to fuck up.

Soil might be to hot. Good answers by others below.

Pottasium responsible for tugor pressure if it was deficient she would droop. If it was toxicity she would present chlorosis of primarily older leaves which eventually turns to yellow brown scorch in between the veins. Chlorosis would not be all over as it is. Yellowing leaf edges, especially on lower leaves, often indicate a problem with watering, nutrient deficiencies, or light issues, waterlogged soil prevents roots from getting enough oxygen, leading to root damage and yellowing, particularly on older growth. While less common, consistently dry soil can also cause yellowing edges, starting with the oldest leaves. High temperatures can cause rapid water loss, leading to leaf edges curling and yellowing as the plant tries to conserve moisture. Water loss happens faster than cooling occurs. The fact it's only the edges of leaf tells you the plant was dictating what part of leaf too sacrifice first. Magnesium helps plants cope with high temperatures and other environmental stresses by activating stress response mechanisms and maintaining overall plant health. She took a hard hit depleting her magnesium reserves. She will bounce back with some Tlc. Good luck.

Reminds potassium toxicity. I think, i see signs of magnesium deficiency and nitrogen toxicity too ( both very possible if not happening). Leave tacoing definitely from temps, but watch out feeding too. Care about root zone is very important in heat situations , so keep good wet/dry regime for soil, try to do waterings on plants early morning. Increase air exchange too if you can ....

Hi bud. The canoeing of the leaves would hint at heat stress. Heat stress doesn't work from the bottom of the plant upwards. Without knowing anything about your setup, rh and temps I am going to estimate that nitrogen overdose combined with temps is the culprit. The leaves are otherwise dark green. The tips and edges would be yellowing from nutrient burn. To be expected when the temps are high and the plant isn't breathing properly. Hope this helps, even just a little.