Benzelsanswered grow question 3 years ago You only cut leaves if they are blocking BUDS from getting light or growing tips of new shoots. They dont need more "air' or "h20" so please dont cut leaves off unless you know why you are cutting them off. If you think " this leaf is blocking that new shoot im trying to grow up' then yes cut it off, but if you just want to cut something cause you think it will help- then stop. put the scizzors down and step away from your plant.