Cannabis Doctor Quickly Diagnose Your Cannabis Leaf Colors Black or Gray Patches on LeavesBrown or Dark SpotsDark or Purple LeavesEdges Appear Brown or BurntMottling / Mosaic PatternPale Color LeavesPatches of white powder on leavesRed or Pink Color on LeavesVeins of Leaves Stay GreenYellow Leaves - Lower, older leavesYellow Leaves - New GrowthYellowing Between Veins Root Symptoms BrownMushySlow GrowingSmelly Leaf Symptoms Abnormal GrowthAll Leaves Seem AffectedLeaf Edges Appear BurntLeaf Tips Appear BurntLeaf Tips DieLeaves Curl UnderLeaves Curl UpwardsLower Leaves / Older Growth AffectedMottling / MosaicOld Leaves Dropping OffPatches of white powder on leavesRed StemsSlow GrowthSmall Inner Leaves AffectedSpotsThick Growth TipsTwisted GrowthUpper Leaves / Newer Growth AffectedVeins of Leaves Stay GreenWebbing on leavesWilting / DroopingYellowing Between Veins Plant Symptoms Leaves Curl UnderLeaves Curl UpwardsOld Leaves Dropping OffPlant Wilting / DroopingRed or Purple StemsSlow GrowthStretch (big spaces between nodes)Too ShortToo TallTwisted GrowthWeak Stems Other Symptoms Buds Not FatteningBugsMoldWebbing Under-watering Underwatering can be a huge issue, dry medias won’t allow nutrient exchange and often damage your roots. The lasting affects from a drought or simply … Under-watering Read More » White Powdery Mildew Powdery Mildew Are you observing powdery white spots developing on your leaves, new growth or stalks? Moving from one plant or group of plants to … White Powdery Mildew Read More » Wind Burn Most of the time issues with air flow tend to be from lack of air flow or stagnate air flow. More often then not air … Wind Burn Read More » Zinc Deficiency Are your younger leaves of your plant starting to fade, yellowing between the vein, or in the margins, tips of leaves discoloring and dying? Then … Zinc Deficiency Read More » Previous123