Why would he need nitrogen at this stage he's 4 weeks into flowering and all bloom boosters contain enough nitrogen for what he needs right now and all his leaves are yellow and aren't going to turn green again from adding extra nitrogen, Tomato foods contains feck all nitrogen and is for the flowering stage of a tomato plant to feed the fruits of a plant, mericle grow would work bit inconsistent levels not good for cannabis if he uses a and b canna it's inly cheap and he will have good results but all he can do is try to nurse that plant along till harvest cause it isn't going too come back from that scorch, sorry now no offence for the difference of opinions bro