So I've been trying to grow avocado plants for a while now, the leaves always seem to curl up and fall. I even changed it to rain water but nothing seems to be working. The answers online are all contradicting each other like "Too much fertiliser" and "lacking nutrient" or "Overwatered" and "Underwatered". Like am I supposed to water it more or less? I'm not sure what the problem is so if anyone knows please help!!