Black on leaves if not placed there by you is most likely a disease. Check the FAQ section for examples and pics.

I noticed the drooping too. The soil in a few of my smaller plants stays wet longer and they tend to droop.

Do you have a fan circulating air around the plants?
greenbastard Reviewed by greenbastard on . Why do my plants droop at specific times? I noticed that whenever i water my plants, some leaves and the stem slightly droop down. At first i thought it was because i over watered them but then i waited until the soil was REALLY dry and watered again, but the same thing happened. Also, one on of my plants, some leaves have some black stuff on it. The texture of the leaf is normal but the color of it is black. I will post pics of this as soon as I can, but if someone knows what i am talking about, please help me out. Rating: 5