Problem: The initial symptoms may appear similar to a nitrogen deficiency (yellowing of older, lower leaves). Leaves may become mottled or spotted. However, the tell-tale sign of a molybdenum deficiency is the leaves may start to display a unique orange,…
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…
Problem: A sulfur deficiency is relatively rare and will manifest itself as all-over chlorosis (yellowing of leaves), usually starting with the newer leaves and at first may look like a nitrogen deficiency. The parts underneath the leaves may take on…
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…