Root Rot
Cannabis Root Rot – Slimy, brown, twisted or unhealthy roots are caused by unwanted pathogens in your hydroponic tank! The marijuana plant on the left is healthy, and the plant on the right has root rot. The curled, drooping, unhealthy…
Category Spots or Markings
Slugs or Snails
Slugs or Snails Attacking Your Cannabis Plants? Get Rid of Them Quick! Ewwww slugs and snails are eating the leaves and buds of my cannabis plants!!!! Although not the most common cannabis pest, slugs and snails are unwelcome visitors when…
Spider Mites
Spider mites are part of the mite family and are related to spiders, ticks, and other mites. Although they’re a common cannabis pest, they can be very difficult to get rid of. First Sign of Spider Mite Damage – Tiny…
Thrips
What Does Cannabis Thrip Damage Look Like? Adult thrips are small, fast-moving insects, while young thrips look like tiny unmoving pale worms on the leaves. In fact, thrips can come in many forms, from wormy nymphs to dark or golden…
Tobacco Mosaic Virus (TMV)
Can Tobacco Mosaic Virus (TMV) spread to cannabis plants? Some growers believe mosaic virus can infect weed, yet actual evidence of cannabis transmission is hard to come by. What is Tobacco Mosaic Virus anyway? TMV is a virus that is…
Whiteflies
White flies appear like small white moths when they’re flying around and otherwise act a bit like spider termites; hanging out below the leaves and taking vital nutrients from the plant. This leads to white areas on thetop of the…
Planthoppers
Melanoliarus planthopper on a marijuana leaf (Source: Whitney Cranshaw) Typically among the primary signs is a white fuzzy development that is typically misinterpreted for mold or white grainy mildew. Nevertheless, it is really a secretion from the planthopper. The bugs…
Potassium Deficiency
What Does a Marijuana Potassium Deficiency Appear Like? Leaf Issue / Signs: With a cannabis potassium deficiency, you’ll normally see signs on older leaves, however not constantly. In some cases you’ll see the signs at the top of the plant.…
Leaf Miners
The term ‘leaf miner’ is a common name for a type of pest actually lives inside the tissue of the leaf. These bugs mine through the leaf eating the best parts, and leave a trail of damage behind. These long,…
Leaf Septoria / Yellow Leaf Spot
Stop Leaf Septoria (Yellow Leaf Spot) in Its Tracks! Sometimes called ‘yellow leaf spot’ or ‘leaf septoria,’ this condition is caused by a fungus (or sometimes a bacteria) that attacks cannabis plants and usually appears in warm, wet weather. The…
Leafhoppers
Does your cannabis plant have leafhoppers? These pests will happily munch on your leaves, leaving brown or yellow spots. They can sometimes spread certain plant diseases so get rid of them quick! Cannabis leafhopper damage There are at least 20,000…
Light Burn or Light Stress
Problem: Your cannabis plant can only withstand a certain amount of light. After a certain point, your cannabis will start turning yellow or otherwise exhibit signs of stress on the leaves near the sources of light and/or heat. Light burn…
