Nah, you should be very unlucky to get mold at 58... I have 75 and no mold, i always have the grow box open :) Remember to keep clean and take off dead/damaged leaves and you won't have problems
hi mate, no problems with that humidity levels, 40-60% is safe if you keep a good airflow and a clean grow space, but you should try to aim for 40-50% RH. Happy growing 🤝