Use our cannabis growing problem pictures and interactive plant doctor tool to quickly diagnose your sick marijuana plants! Click the pictures below to learn about a marijuana problem, deficiency or symptom & get the solution! Still having trouble? Consult our 5-Step Remedy to 99% of Cannabis Growing Problems.
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Select cannabis plant symptoms to narrow down your search below:
Accidental Re-Vegging
"Re-veg" is short for "re-vegetation" and refers to what happens if a flowering plant stops flowering and re-enters the vegetative ...
Barnacle Scales
These unusual bugs hang out on your stems and under your leaves without moving. Scale insects suck the life out ...
Beet Curly Top Virus
Beet Curly Top Virus (BCTV) is a cannabis plant disease that may cause curling, twisting leaves, yellowing, and stunting. Often ...
Boron Deficiency
A boron deficiency in cannabis is relatively rare unless a plant is underwatered or in a really dry environment, and ...
Broad Mites
Broad mites on your cannabis plants are so tiny they are practically impossible to spot with the naked eye, and can ...
Bud Rot or Mold
Bud rot in cannabis plants is caused by mold, and is most likely to appear when buds are dense and the ...
Calcium Deficiency
Calcium is an important nutrient which helps provide structure to the cannabis plant and helps it withstand stress like from ...
Caterpillars & Inchworms
Sometimes the first sign of caterpillars / worms / cabbage loopers is just seeing chunks of your leaves missing. You may also see ...
Copper Deficiency
A cannabis copper deficiency appears with leaf symptoms such as dark leaves that take on blue or even purple undertones. The ...
Four-lined plant bug
This picture is often misdiagnosed as Leafhoppers but it is cannabis leaf damage of a four-lined plant bug (Poecilocapsus lineatus), ...
Fungus Gnats
A fungus gnat is so small it's thinner than the width of a quarter. They commonly appear when cannabis plants ...
Grasshoppers
Grasshoppers (and sometimes locusts, which are basically just grasshoppers with wings) will happily eat your cannabis leaves, leaving holes, and live ...
Heat Stress
Your cannabis plant can only withstand a certain amount of heat and light. After a certain point, your cannabis will ...
Hemp Russet Mites
Hemp russet mites are tiny bugs that attack cannabis plants. In fact, they are so small you can only see ...
Hermies, Pollen Sacs & Bananas
Did you know there are “male” and “female” cannabis plants? Yes, cannabis plants are “dioecious” plants, which means each plant shows ...
Iron Deficiency
A cannabis iron deficiency is usually seen first on bright yellow new leaves, and the symptoms of a cannabis iron deficiency ...
Leaf Miners
The term "leaf miner" is a common name for a type of pest actually lives inside the tissue of the leaf. These ...
Leaf Septoria / Yellow Leaf Spot
Sometimes called "yellow leaf spot" or "leaf septoria," this condition is caused by a fungus (or sometimes a bacteria) that attacks ...
Leafhoppers
These pests will happily munch on your leaves, leaving brown or yellow spots. They can sometimes spread certain plant diseases ...
Light Burn or Light Stress
Your cannabis plant can only withstand a certain amount of light. After a certain point, your cannabis will start turning ...
Magnesium Deficiency
A light green or yellow coloring will begin to show on the veins and edges of the lower & older ...
Manganese Deficiency
Leaves may become yellow in between the veins, with mottled brown spots on the affected leaves. These brown dead patches ...
Molybdenum Deficiency
The initial symptoms may appear similar to a nitrogen deficiency (yellowing of older, lower leaves). Leaves may become mottled or ...
Nitrogen Deficiency
A cannabis nitrogen deficiency will cause the older, lower leaves on your plant to turn yellow, wilt away and eventually ...
Nitrogen Toxicity
Dark green leaves, shiny leaves, clawing, weak stems, and overall slow growth. Marijuana leaves that are nitrogen toxic often get ...
Nutrient Burn
Nutrient burn or fertilizer burn is one of the most common beginner cannabis growing problems. The yellow or brown leaf ...
Over-Watering
After watering, your plants start drooping. Usually the droopy leaves will feel firm and appear curled down (the whole leaf ...
pH Fluctuations
Managing pH is crucial for cannabis plants to be able to take up nutrients through their roots. When the pH ...
Phosphorus Deficiency
A cannabis phosphorus deficiency generally appears on leaves from the lower/older parts of the plant. The lower leaves may turn ...
Planthoppers
Planthoppers can attack and infest cannabis, leaving a unique cotton-like growth while they suck the life out of your plants! ...
Potassium Deficiency
With a marijuana potassium deficiency, you'll generally see symptoms on older leaves, but not always. Sometimes you'll see the symptoms at the ...
Root Problems
Cannabis plants with root problems show many symptoms. They may appear overwatered or droopy, leaves curl or cup, wilted, slow ...
Slugs or Snails
Although not the most common cannabis pest, slugs and snails are unwelcome visitors when they do show up! Sure signs ...
Spider Mites
Spider mites are part of the mite family and are related to spiders, ticks, and other mites. Although they’re a ...
Sulfur Deficiency
A sulfur deficiency is relatively rare and will manifest itself as all-over chlorosis (yellowing of leaves), usually starting with the ...
Tobacco Mosaic Virus (TMV)
Tobacco Mosaic Virus (TMV) is a virus that is commonly found in tobacco plants which causes splotchy or twisted leaves, strange mottling ...
Under-watering
If your plant is drooping, then it’s usually a sign of either over or under-watering. Leaves often seem “papery” and ...
White Powdery Mildew
White powdery mildew is usually a minor annoyance that's easily fixed, but if you don't catch it early, white powdery ...
Whiteflies
White flies look like tiny white moths when they're flying around and otherwise behave a bit like spider mites; hanging ...
Zinc Deficiency
With a cannabis zinc deficiency, younger leaves start yellowing in between the veins. Leaf tips get discolored and start dying ...
Alternative: Quick Text Guide to Common Cannabis Plant Problems (Beta Version)