Brown spots and yellowing leaves

Get some cal mag..

Hi! I think it also has to do with the light, because in terms of nutrients, they're getting what they need and the other leaves look perfectly fine 🙂. As I read in your diary, your plants have grown well and are almost touching your lamp; they're really too close. Your middle leaves are naturally getting the warmest, so there should be more airflow around there. Your plant still has some time to go, so I hope you can hang your lamp somewhere else or higher. I hope I could help. Good luck!!🌱

Are you getting water on the leaves? If so the light is being magnified and causing light burn. Looks like water spots light burn. If you think it is still a deficiency, the first thing to do is check your run off ph. Most deficiency problems are mearly ph lock out. Good luck and happy growing. 🌲🌲🌲👊💨💨💨