GMSgrowsanswered grow question 4 years ago Little brown spots half way to the top is caused by dry spots in your root zone. Fabric planters allow your nutes and water to run out the sides of your planters before everything gets wet. Happens after the pots are full of roots, usually just after going into flower. I dont use them for that reason. Nute and hydroponic store owners love those planters cuz you need to use twice the nute to water them properly. Money into their pocket from yours. Go to 5 gallon plastic planters, no more spots or water the hell out of them fabric ones.. Cheers friend