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Cannabis Nutrient Deficiency Chart

Cannabis Nutrient Deficiency Chart

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

NITROGENExcessDeficiency

Cannabis Nitrogen 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

PHOSPHORUSExcessDeficiency

Cannabis Phosphorus 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

POTASSIUMExcessDeficiency

Cannabis Potassium 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

CALCIUMExcessDeficiency

Cannabis Calcium 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

MAGNESIUMExcessDeficiency

Cannabis Magnesium 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

SULFURExcessDeficiency

Cannabis Sulfur 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

BoronExcessDeficiency

Cannabis Boron 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

ChlorineExcessDeficiency

Cannabis Chlorine 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

IronExcessDeficiency

Cannabis Iron 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

ManganeseExcessDeficiency

Cannabis Manganese 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

MolybdenumExcessDeficiency

Cannabis Molybdenum Deficiency
Cannabis Molybdenum Deficiency
 

 

Leaves Discoloration

Iron Deficiency

Signs Of Iron Deficiency

 

 

Leaves Dropping Off At Top & Bottom

Leaves Discolor & Become Dry

Distorted Leaves

ZincExcessDeficiency

Cannabis Zinc 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

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