Cannabis Nutrient Deficiency Chart

Sick Cannabis plants are most often the result of a deficiency in one or more major or minor elements needed for healthy cannabis growth. Therefore being able to diagnose cannabis nutrient deficiencies is the key to correcting the issue and maintaining healthy plants. There is a famous Cannabis Nutrient Deficiency Chart that was published by Jorge Cervantes & Illustrated by Chris Valdes but it is not printer friendly in any way. Also because it is one large illustrated chart it is difficult to use without panning and zooming.

In an effort to correct that, below you will find two tables that are much more computer and printer friendly. The major elements of Nitrogen, Phosphorus & Potassium, combined with the minor elements of Calcium, Magnesium &Sulfur are in the first table. Deficiencies and excess in these elements will cause over 95% of all issues with cannabis plants. The second table contains information about cannabis nutrient deficiencies for trace elements. Issues involving trace elements should be rare.

Printable Cannabis Nutrient Deficiency Chart – Cannabis Nutrient Deficiency Chart PDF

Cannabis Nutrient Deficiency Chart Major & Minor Elements
NITROGEN	Excess	Deficiency
Cannabis Nitrogen Deficiency	Bottom Leaves Turn Dark Green Leaves Get Greener From Base To Tip Stems & Foliage Become Weak Water Uptake/Transport Become Weak Buds That Taste Like Grass	Bottom Leaves Turn Yellow Leaves Get Yellower From Base To Tip Leaves Lose Luster, Curl, Or Drop Short Plant With Small Leaves Premature Flowering & Low Yields
PHOSPHORUS	Excess	Deficiency
Cannabis Phosphorus Deficiency	Thin Bladed Leaves Burned Leaf Tips Smaller Internodal Space (Space Between Nodes) Lower Leaves Curl & Develop Spots Signs Of Zn, Ca, Mg, Fe deficiencies	Blue-Green Leaves Leaf Stems Turn Purple Dark Dead Spots On Lower Leaves Lower Leaves That Curl, Wither, & Drop Off Slow Growth
POTASSIUM	Excess	Deficiency
Cannabis Potassium Deficiency	Root Zone Turns Acidic – Drop In pH Burned Leaf Tips Smaller Internodal Space (Space Between Nodes) Lower Leaves Curl & Develop Spots Signs Of Zn, Ca, Mg, Fe deficiencies	Weak & Brittle Stems Pale Older Leaves Increased Branching Rusty, Burnt Color On Leaves Plant Is Slow To Flower
CALCIUM	Excess	Deficiency
Cannabis Calcium Deficiency	Stunted Growth Minor Leaf Wilting Blockage Of Key Elements: K, Fe, Mg, Mn	Lowers Leaves Curl Yellowish Brown Spots On Leaves Slow Flower Development
MAGNESIUM	Excess	Deficiency
Cannabis Magnesium Deficiency	Stunted Growth Dark Green Leaves Resembles Salt Toxicity	Yellowing & Rust Spots On Leaves Plant Has Sickly Appearance Dried Out Older Leaves That Drop
SULFUR	Excess	Deficiency
Cannabis Sulfur Deficiency	Stunted Growth Leaf Tip Burn Leaf Discoloration	Lime Green to Yellow Leaves Yellow Stems Downward hook on leaves Woody Stems Slow or Weak Flower Formation

Cannabis Nutrient Deficiency Chart Trace Elements
Boron	Excess	Deficiency
Cannabis Boron Deficiency	Stunted Growth Leaf Tips Yellow & Then Burn Leaves Turn Yellow	Rust Colored Stems Leaves Thicken & Become Brittle Stems, Leaf Tips, New Shoots Show Abnormal Growth
Chlorine	Excess	Deficiency
Cannabis Chlorine Deficiency	Leaves Yellowish Brown Color Leaves Slow To Develop Young Leaves Turn Yellow At Tips	Thick Root Tips Leaves Tips Burn To Yellowish Brown Color Young Leaves Pale & Wilted
Iron	Excess	Deficiency
Cannabis Iron Deficiency	Leaves Turn Bronze With Brown Spots Phosphorus Intake Impaired Signs Of Phosphorus Deficiency	Young Leaves Develop Chlorosis Starting From Tip Older Leaves Develop Cholorosis Leaves Start To Wither & Die
Manganese	Excess	Deficiency
Cannabis Manganese Deficiency	Dark Orange Spots On Leaves Leaf Tissue Damage Symptoms Seen On Younger Leaves First	Young Leaves Show Chlorosis Leaves Become Pale & Fall Off Margins Of Leaves Stay Dark Green While Rest Yellows
Molybdenum	Excess	Deficiency
Cannabis Molybdenum Deficiency	Leaves Discoloration Iron Deficiency Signs Of Iron Deficiency	Leaves Dropping Off At Top & Bottom Leaves Discolor & Become Dry Distorted Leaves
Zinc	Excess	Deficiency
Cannabis Zinc Deficiency	Effects Iron Uptake Toxic Level pH readings Signs Of Iron Deficiency	Leaves Burn Tip To Stem Smaller Internodal Space & New Flowers Small, Thin Wrinkled Leaf Blades