Planted 3-23-12 with miracle-gro expand n gro soil have not fertilized since i planted....warner ecstatic few days when it's needed gets natural sun light and darkness it is placed on my front pourch in a 6 in flower pot tips of leaves browing and curling help......
All MG products have time released water activated nutes. So, every time you water, you also feed. When you do water how much are you giving them> That is likely the issue, too much water releasing to much nute cause you got burn there.
I water it like every 2-4 days and I don't really measure how much water but not a lot I don't think like half or a little more than half an 8 oz glass...
I can't really say what's wrong. Maybe nute burn, but I doubt it as long as you didn't add any nutes besides what's already in the soil. I have grown with Miracle Grow soil with an NPK of 24-16-32. I didn't add any nutes until I was about 3 weeks into flowering. I used cheap Walmart fertilizer called Shultz which was 15-30-15 for my bloom nutes. I added 1 teaspoon to a gallon of water and I had great results with it. I'm a newbie and this was my 1st indoor harvest but not my 1st grow, but I have alot of knowledge from all of the reading and researching all of the aspects of growing cannabis. It doesn't look so bad that it can't bounce back from it. Just keep a close eye and just keep searching for answers. Don't do anything drastic unless you are absolutely sure. My motto is less is more when growing cannabis. This motto has served me very well so far. Good Luck buudy!
As long as there is green a plant can live. I only saw 1 pic there that even remotely showed signs of male buds, the first one on the last post but it is so blurry I cannot tell.