AsNoriuanswered grow question 3 months ago all npk i would say ;) verge - usually potassium, some spots of necrosis is massive, so guess phosphorus is needed too, purple stem - either too intense light ( but leaves with many fingers, so bottom one) . so its potash, phosphorus or magnesium. i see a bit striping too in leaf downgrade, so would guess magnesium is needed .
you in flower , plant is hungry. thats my look from one photo. attach diary, provide more info in question.