Symptom Dark Leaves

Copper Deficiency

Copper Deficiency 1

Problem: A cannabis copper deficiency appears with leaf symptoms such as dark leaves that take on blue or even purple undertones. The tips and edges of leaves turn pale yellow or white in stark contrast to the rest of the…

Phosphorus Deficiency

Phosphorus Deficiency 3

Issue: A marijuana phosphorus deficiency normally appears on leaves from the lower/older parts of the plant. The lower leaves might turn dark green or yellow, and begin getting areas or huge splotches that look brown, bronze and even a little…