What goes on above the soil line often is a reflection of what’s happening underground. If you observe wilting, drooping leaves on a cannabis plant, look to the roots: You may be witnessing the beginnings of “root rot.”
Root rot can be caused by a range of factors, including various types of bacteria, fungi, algae, and parasitic oomycetes. These organisms may act on the plant in different ways, but the outcome is usually the same: slimy or mushy roots that twist together, impeding healthy plant development.