I've got yellowing and necrotic leaves that look like nitrogen deficiency, but im a newbie so I just want to check. This is my second grow, and I didn't get this the first time around. This has been going on for ages, but I've nuted with nitrogen for their whole life. They're one week into flowering now, so I have flushed and started on flowering nutes. Should I be adding some nitrogen? It just seems like a strange thing to do during flowering. Any feedback greatly appreciated, cheers guys.