For damping off I use ground cinnamon Ā sprinkled on the soil , it really works! Ā a lot of tropical plants Ā have an anti -insect and anti fungial properties Ā [Why spices were so popular before the advent of refridgeration ] .. also using too big a pot or upsizing to a bigger pot too soon Ā as mentioned above, bottom watering and keeping the soil loose at the surface to aid in evaporationĀ