Sweet tea would not be the best supplement for your plants. Sugar water does benefit plants, but only if its occasionally. But there is not much sugar in sweet tea, also the sugar is not the kind the plant can use immediately so it would have to digest it and make it into new compounds. Also black tea is mildly acidic. So prolonged use would acidify your soil, as well as create a hyper tonic solution in your soil which would pull water out of your plants.lol u in north carolina? I heard of some bud called sweet tea going around