AsNoriuanswered grow question 2 years ago those burned edges would say aftermath of nitrogen toxicity, but looking at diary i tend to think it was very big girl on poor diet, she needed potassium a lot, pk booster would be nice.
when you chop her, check roots, can make a bet she bounded on bottom a bit.
better food schedule, double check ph , a bit bigger pot and next time you are close to newbie of the month award.
Happy Growing !!!