Yellowing of marijuana leaves and leave tips burn
Use this chart to help you determine the possible causes for whatever strange problem you seem to be having. Don't forget that your problem may not necessarily be a lack of any particular nutrient, the issue is often availability. High pH can prevent plants from absorbing vital nutrients. Extreme humidity may cause marijuana leaves to remain tissue paper thin. Take small steps in your attempts to balance your nutrient solution. It is better to under-feed your marijuana plants than to overdose them. Try adding about half of a recommended concentration as you experiment. You can always add more later.
Symptoms
Iron [Fe]
Symptoms: Marijuana leaves on growing shoots turn pale and veins remain dark green. pH imbalances make iron insoluble.
Solution: Foliar feed with chemical fertilizer containing Iron [Fe] or rusty water.
Manganese [Mn]
Symptoms: Necrotic and yellow spots form on top marijuana leaves. Magnese [Mn] deficiency occurs when large amounts of Magnesium [Mg] are present in the soil.
Solution: Foliar feed with any chemical fertilizer containing Magnese [Mn].
Molybdenum [Mb]
Symptoms: Yellowing of middle marijuana leaves.
Solution: Foliar feed with chemical fertilizer containing Molybdenum [Mb].
Nitrogen [N]
Symptoms: Pale marijuana plants, red stems, smaller growth. Rapid yellowing of lower leaves progressing up the marijuana plant.
Solution: Add any chemical fertilizer containing Nitrogen [N]. Treated marijuana plants will recover in about a week.
Pottasium [K]
Symptoms: Affected marijuana plants are usually tallest and appear to be most vigorous. Necrotic spots form on lower marijuana leaves. Red stems. Leaves appear pale or yellow.
Solution: Add chemical fertilizer containing Potassium [K].
Manganese [Mn]
Symptoms: Necrotic and yellow spots form on top marijuana leaves. Magnese [Mn] deficiency occurs when large amounts of Magnesium [Mg] are present in the soil.
Solution: Foliar feed with any chemical fertilizer containing Magnese [Mn].
Molybdenum [Mb]
Symptoms: Yellowing of middle marijuana leaves.
Solution: Foliar feed with chemical fertilizer containing Molybdenum [Mb].
Manganese [Mn]
Symptoms: Necrotic and yellow spots form on top marijuana leaves. Magnese [Mn] deficiency occurs when large amounts of Magnesium [Mg] are present in the soil.
Solution: Foliar feed with any chemical fertilizer containing Magnese [Mn].
Manganese [Mn]
Symptoms: Necrotic and yellow spots form on top marijuana leaves. Magnese [Mn] deficiency occurs when large amounts of Magnesium [Mg] are present in the soil.
Solution: Foliar feed with any chemical fertilizer containing Magnese [Mn].
Nitrogen [N]
Symptoms: Pale marijuana plants, red stems, smaller growth. Rapid yellowing of lower leaves progressing up the marijuana plant.
Solution: Add any chemical fertilizer containing Nitrogen [N]. Treated marijuana plants will recover in about a week.
Magnesium [Mg]
Symptoms: Lower cannabis leaves yellow and may even turn white while veins remain dark green. Blades die and curl upward.
Solution: This can be quickly resolved by watering with one tablespoon Epsom salts per gallon | 3.5 of water. Until you can correct nutrient lockout, try foliar feeding.
Pottasium [K]
Symptoms: Affected marijuana plants are usually tallest and appear to be most vigorous. Necrotic spots form on lower marijuana leaves. Red stems. Leaves appear pale or yellow.
Solution: Add chemical fertilizer containing Potassium [K].
Over fertilization
Symptoms: Causes marijuana leaf tips to appear yellow or burnt.
Solution: To correct soil should be flushed with three gallons | 10 liters of water per one gallon | 3.5 liter of soil.
Copper [Cu]
Symptoms: Fungicide, sulfate [Cocus]
Solution: Apply foliar.
Boron [B]
Symptoms: Growing marijuana shoots turn grey or die. Growing shoots appear burnt.
Solution: Treat with one teaspoon of Boric acid [sold as eyewash] per gallon | 3.5 liter of water.
Nitrogen [N]
Symptoms: Pale marijuana plants, red stems, smaller growth. Rapid yellowing of lower leaves progressing up the marijuana plant.
Solution: Add any chemical fertilizer containing Nitrogen [N]. Treated marijuana plants will recover in about a week.
Zinc [Zn]
Symptoms: White areas form at the marijuana leaf tips and between veins. Occurs in alkaline soils.
Solution: Zinc [Zn] deficiency can be treated by burying galvanized nails in the soil. Chemical fertilizer containing Zinc [Zn] can also be used.
Pottasium [K]
Symptoms: Affected marijuana plants are usually tallest and appear to be most vigorous. Necrotic spots form on lower marijuana leaves. Red stems. Leaves appear pale or yellow.
Solution: Add chemical fertilizer containing Potassium [K].
Boron [B]
Symptoms: Growing marijuana shoots turn grey or die. Growing shoots appear burnt.
Solution: Treat with one teaspoon of Boric acid [sold as eyewash] per gallon | 3.5 liter of water.
Zinc [Zn]
Symptoms: White areas form at the marijuana leaf tips and between veins. Occurs in alkaline soils.
Solution: Zinc [Zn] deficiency can be treated by burying galvanized nails in the soil. Chemical fertilizer containing Zinc [Zn] can also be used.
Molybdenum [Mb]
Symptoms: Yellowing of middle marijuana leaves.
Solution: Foliar feed with chemical fertilizer containing Molybdenum [Mb].
Magnesium [Mg]
Symptoms: Lower cannabis leaves yellow and may even turn white while veins remain dark green. Blades die and curl upward.
Solution: This can be quickly resolved by watering with one tablespoon Epsom salts per gallon | 3.5 of water. Until you can correct nutrient lockout, try foliar feeding.
Iron [Fe]
Symptoms: Marijuana leaves on growing shoots turn pale and veins remain dark green. pH imbalances make iron insoluble.
Solution: Foliar feed with chemical fertilizer containing Iron [Fe] or rusty water.
Pottasium [K]
Symptoms: Affected marijuana plants are usually tallest and appear to be most vigorous. Necrotic spots form on lower marijuana leaves. Red stems. Leaves appear pale or yellow.
Solution: Add chemical fertilizer containing Potassium [K].
Zinc [Zn]
Symptoms: White areas form at the marijuana leaf tips and between veins. Occurs in alkaline soils.
Solution: Zinc [Zn] deficiency can be treated by burying galvanized nails in the soil. Chemical fertilizer containing Zinc [Zn] can also be used.
Manganese [Mn]
Symptoms: Necrotic and yellow spots form on top marijuana leaves. Magnese [Mn] deficiency occurs when large amounts of Magnesium [Mg] are present in the soil.
Solution: Foliar feed with any chemical fertilizer containing Magnese [Mn].
Nitrogen [N]
Symptoms: Pale marijuana plants, red stems, smaller growth. Rapid yellowing of lower leaves progressing up the marijuana plant.
Solution: Add any chemical fertilizer containing Nitrogen [N]. Treated marijuana plants will recover in about a week.
Phosphorus [P]
Symptoms: Slow or stunted growth, red stems. Smaller marijuana leaves that are dark green. Lower marijuana leaves are yellow and die.
Solution: Add chemical fertilizer containing Phosphorus [P]. Affected marijuana leaves will not show recovery but new growth will appear normal.
Phosphorus [P]
Symptoms: Slow or stunted growth, red stems. Smaller marijuana leaves that are dark green. Lower marijuana leaves are yellow and die.
Solution: Add chemical fertilizer containing Phosphorus [P]. Affected marijuana leaves will not show recovery but new growth will appear normal.
Nitrogen [N]
Symptoms: Pale marijuana plants, red stems, smaller growth. Rapid yellowing of lower leaves progressing up the marijuana plant.
Solution: Add any chemical fertilizer containing Nitrogen [N]. Treated marijuana plants will recover in about a week.
Molybdenum [Mb]
Symptoms: Yellowing of middle marijuana leaves.
Solution: Foliar feed with chemical fertilizer containing Molybdenum [Mb].
Zinc [Zn]
Symptoms: White areas form at the marijuana leaf tips and between veins. Occurs in alkaline soils.
Solution: Zinc [Zn] deficiency can be treated by burying galvanized nails in the soil. Chemical fertilizer containing Zinc [Zn] can also be used.
Nitrogen [N]
Symptoms: Pale marijuana plants, red stems, smaller growth. Rapid yellowing of lower leaves progressing up the marijuana plant.
Solution: Add any chemical fertilizer containing Nitrogen [N]. Treated marijuana plants will recover in about a week.
Nitrogen [N]
Symptoms: Pale marijuana plants, red stems, smaller growth. Rapid yellowing of lower leaves progressing up the marijuana plant.
Solution: Add any chemical fertilizer containing Nitrogen [N]. Treated marijuana plants will recover in about a week.
Pottasium [K]
Symptoms: Affected marijuana plants are usually tallest and appear to be most vigorous. Necrotic spots form on lower marijuana leaves. Red stems. Leaves appear pale or yellow.
Solution: Add chemical fertilizer containing Potassium [K].
Phosphorus [P]
Symptoms: Slow or stunted growth, red stems. Smaller marijuana leaves that are dark green. Lower marijuana leaves are yellow and die.
Solution: Add chemical fertilizer containing Phosphorus [P]. Affected marijuana leaves will not show recovery but new growth will appear normal.
Pottasium [K]
Symptoms: Affected marijuana plants are usually tallest and appear to be most vigorous. Necrotic spots form on lower marijuana leaves. Red stems. Leaves appear pale or yellow.
Solution: Add chemical fertilizer containing Potassium [K].
Pottasium [K]
Symptoms: Affected marijuana plants are usually tallest and appear to be most vigorous. Necrotic spots form on lower marijuana leaves. Red stems. Leaves appear pale or yellow.
Solution: Add chemical fertilizer containing Potassium [K].
Molybdenum [Mb]
Symptoms: Yellowing of middle marijuana leaves.
Solution: Foliar feed with chemical fertilizer containing Molybdenum [Mb].
Phosphorus [P]
Symptoms: Slow or stunted growth, red stems. Smaller marijuana leaves that are dark green. Lower marijuana leaves are yellow and die.
Solution: Add chemical fertilizer containing Phosphorus [P]. Affected marijuana leaves will not show recovery but new growth will appear normal.
Copper [Cu]
Symptoms: Fungicide, sulfate [Cocus]
Solution: Apply foliar.
