Nutrient Dissorders

[Motor City Madman]

In no way do I claim this information as my own. It is compiled from many different sources on the web and is very useful for troubleshooting plant problems.

MCM


Nitrogen

Deficiency
Older leaves turn chlorotic and may eventually die. Plant is stunted
Foliage is light green.
Excess​

Plant becomes over vigorous, leaves become very dark green.
Fruit clusters have excessive growth and fruit ripening is delayed.

Potassium
Deficiency​

Older leaves appear chlorotic between veins, but veins remain green.
Leaf edges may burn or roll.
Excess
Uncommon to show toxicity. Secondary manganese deficiency may occur.​

Phosphorous
Deficiency

Stem, leaf veins, petioles turn yellow, followed by reddish-purplish as
phosphorous is drawn from them into the new growth. Seedlings may
develop slowly. Fruiting is poor.
Excess
​

No direct toxicity. Copper and zinc availability may be reduced.

Calcium
Deficiency​

Plant is stunted. Young leaves turn yellow. Blossoms die and fall off.
Excess
​

No direct toxicity.

Sulfur
Deficiency​

Younger leaves become yellow with purpling at base. Older leaves turn light green.
Excess
Small leaves.

Iron
Deficiency​

New growth pales, veins stay green. Blossoms drop off. Yellowing occurs between veins.
Excess
Very uncommon.

Magnesium
Deficiency​

Older leaves curl and yellow areas appear between veins. Young leaves curl and become brittle.
Excess
No direct toxicity.

Zinc
Deficiency
Leaves become chlorotic between veins and often develop necrotic spots.
Excess
Reduces availability of iron.

Molybdenum
Deficiency​

Older leaves turn yellow and leaf margins curl.
Excess
Rare. leaves may turn bright yellow.

Copper
Deficiency​

Pale yellow. Leaves become spotted. Plant is stunted.
Excess
May reduce availability of iron.​

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[Wiseguy_Chef]

very good post!!