Yellow Leaves

Root Rot

Root Rot

Cannabis Root Rot – Slimy, brown, twisted or unhealthy roots are caused by unwanted pathogens in your hydroponic tank! The…

Sulfur Deficiency

Sulfur Deficiency

Problem: A sulfur deficiency is relatively rare and will manifest itself as all-over chlorosis (yellowing of leaves), usually starting with…

Tobacco Mosaic Virus (TMV)

Tobacco Mosaic Virus (TMV)

Can Tobacco Mosaic Virus (TMV) spread to cannabis plants? Some growers believe mosaic virus can infect weed, yet actual evidence…

Under-watering

Under-watering

Issue: If your plant is sagging, then it’s normally an indication of either over or under-watering. Marijuana Underwatering Signs sagging…

Wind Burn

Wind Burn

Many indoor marijuana growers utilize fans to blow air around within the grow location. This develops a great breezy environment…

Zinc Deficiency

Zinc Deficiency

Issue: With a marijuana zinc deficiency, more youthful leaves start yellowing in between the veins. Leaf suggestions get tarnished and…

Molybdenum Deficiency

Molybdenum Deficiency

Problem: The initial symptoms may appear similar to a nitrogen deficiency (yellowing of older, lower leaves). Leaves may become mottled…

Nitrogen Deficiency

Nitrogen Deficiency

Problem:A cannabis nitrogen deficiency will cause the older, lower leaves on your plant to turn yellow, wilt away and eventually…

Nitrogen Toxicity

Nitrogen Toxicity

Problem: Dark green leaves, shiny leaves, clawing, weak stems, and overall slow growth. Marijuana leaves that are nitrogen toxic often…

Overwatering

Overwatering

Problem: After watering, your plants start drooping. Usually the droopyleaves will feel firm and appear curled down (the whole leaf…

pH Fluctuations

pH Fluctuations

Quick Summary: Handling pH is vital for marijuana plants to be able to use up nutrients through their roots. When…

Planthoppers

Planthoppers

Melanoliarus planthopper on a marijuana leaf (Source: Whitney Cranshaw) Typically among the primary signs is a white fuzzy development that…