Burnt leaves

Thanks for all your help! My plants double and triple in size after your recommendations. Hopefully this is my last problem . So basically I noticed 3 burnt looking looking leaves on my smaller plant. I've read in the past that's what too much nutrients do. Definitely not here, I add 1 drop to 2 cups of water. So it's not that.

Not much info but imo it looks like a ph/root zone problem starting. Give more info especially how you feed water. I don’t understand one drop in two cups?

thats not burn, burn affects the tips of the leaf blades, it's usualy causded by too much nitrogen, that looks more like a deficancy. are you growing in soil, if yes, then get some seaweed solution and water some into your soil, it wont affect your normal feeding schedual and provides loads of essential eliments/nutrients and minerals. its classed as a plant panaca (sp?) or plant tonic

Probably early phosphorus deficiency.