Do Your Marijuana Leaves Have Nutrient Burn? Quick Summary: Nutrient or fertilizer burn is one of the most common beginner cannabis growing problems. Too-high nutrients cause the yellow or brown leaf tips at the roots, which disrupts the flow of…
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…
Problem: A light green or yellow coloring will begin to show on the veins and edges of the lower & older leaves this is one of the classic signs of cannabis magnesium deficiency. You may also see red stems. Magnesium…
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…
Remove plants with both male pollen sacs and female flowers (hermies) to avoid pollination/seeds! You may also see yellow ‘bananas’ (stamens) growing around the pistils/hairs of the buds. A stamen normally grows inside a male pollen sac but sometimes appear…
Hemp russet mites are tiny bugs that attack cannabis plants. In fact, they are so small you can only see them with a magnifier unless there are thousands of them infesting your plant. They live the the crevices of leaves,…
Problem: After watering, your plants start drooping. Usually the droopy leaves will feel firm and appear curled down (the whole leaf will be curled, not just the tips, which is often a sign of nitrogen toxicity). With overwatered cannabis plants,…
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…
Problem: Dark green leaves, shiny leaves, clawing, weak stems, and overall slow growth. Marijuana leaves that are nitrogen toxic often get The Claw or talon-like leaves that are bent at the ends. They also do an oddcurving (orcupping) that is…
Crickets will happily eat your cannabis plants and leave small holes in your leaves. Mole crickets may be found digging around your plant roots. If you see this pest, it’s a good idea to get rid of them before they…
Problem: Calcium is an important nutrient that helps provide structure to the cannabis plant and helps it withstand stress like heat. When your cannabis plant has a calcium deficiency, the main symptom that you’ll be able to notice is brown…
How to Get Rid of Mealybugs on Your Cannabis! These white and hairy bugs enjoy warm temperatures and don’t tolerate the cold.They have even been known togrow and spread even on a dryingplant after harvest, so watch out! They also…