Cannabis Plant Diagnosis Tool

Symptoms:

• Yellowing of older, lower leaves
• Slow growth
• Leaf drop

Treatment:

1. Increase nitrogen supply with organic fertilizers
2. Apply blood meal or fish emulsion
3. Maintain proper pH (6.0-7.0 for soil)

Symptoms:

• Dark green leaves with bluish tint
• Purple stems
• Stunted growth

Treatment:

1. Apply phosphorus-rich fertilizers like bone meal
2. Maintain proper pH balance
3. Ensure soil isn't too cold

Symptoms:

• Leaf edges turn yellow or brown
• Weak stems
• Poor resistance to diseases

Treatment:

1. Apply potassium-rich fertilizers (potassium sulfate)
2. Monitor pH levels for proper absorption
3. Use wood ash as an organic alternative (carefully!)

Symptoms:

• Interveinal chlorosis (yellowing between veins)
• Affects older leaves first
• Brown spots

Treatment:

1. Apply Epsom salts (magnesium sulfate)
2. Adjust pH levels
3. Use 1 tablespoon of Epsom per gallon of water

Symptoms:

• New growth appears distorted
• Weak root development
• Curled leaf tips and brown spots

Treatment:

1. Amend soil with lime or gypsum
2. Ensure proper watering practices
3. Maintain proper pH (6.2-7.0)

Symptoms:

• Tiny yellow or white speckles on leaves
• Fine webbing between leaves and buds
• Yellowing or bronzing of leaves

Treatment:

1. Increase humidity and lower temperature
2. Use neem oil or insecticidal soap
3. Introduce predatory mites
4. For severe cases, consider miticides

Symptoms:

• Small, sap-sucking insects on new growth
• Curled or yellowing leaves
• Sticky honeydew residue
• Black sooty mold growth

Treatment:

1. Spray plants with water to dislodge them
2. Apply neem oil or insecticidal soap
3. Introduce ladybugs as natural predators
4. Remove heavily infested parts

Symptoms:

• Silvery spots on leaves
• Tiny, slender insects (difficult to see)
• Stunted growth
• Discolored, speckled leaves

Treatment:

1. Use sticky traps to monitor and reduce population
2. Apply neem oil or insecticidal soaps
3. Introduce predatory mites
4. Maintain proper sanitation

Symptoms:

• Small flies hovering near soil
• Larvae damaging roots
• Stunted growth
• Wilting despite adequate watering

Treatment:

1. Allow soil to dry between watering
2. Use yellow sticky traps
3. Apply BTI (Bacillus thuringiensis israelensis)
4. Add a layer of sand or diatomaceous earth on top of soil

Symptoms:

• White, powdery fungal growth on leaves
• Starts as small spots that spread
• Stunted growth
• Affected leaves may become yellow and die

Treatment:

1. Improve air circulation
2. Reduce humidity
3. Apply potassium bicarbonate or milk solution (1:3 with water)
4. Remove severely affected leaves

Symptoms:

• Gray mold inside buds
• Buds become brown and mushy
• Occurs in dense buds during humid conditions
• Affected parts decay quickly

Treatment:

1. Remove affected buds immediately
2. Maintain low humidity (below 50% during flowering)
3. Improve airflow around plants
4. Consider earlier harvest if widespread

Symptoms:

• Brown, mushy roots (instead of white/cream healthy roots)
• Plant wilting despite watering
• Stunted growth
• Yellowing leaves

Treatment:

1. Avoid overwatering and ensure proper drainage
2. Use beneficial microbes (mycorrhizae)
3. For severe cases, transplant to fresh medium
4. Add hydrogen peroxide to water (3% solution)

Symptoms:

• Leaves curling upward (taco shape)
• Brown, dry leaf edges
• Leaves appear burnt or scorched
• Slow growth in extreme heat

Treatment:

1. Provide shade during peak sunlight hours
2. Improve ventilation and airflow
3. Maintain optimal temperature (20-28°C/68-82°F)
4. Water more frequently in small amounts

Symptoms:

• Yellowing/bleaching of leaves near light source
• Crispy, dry upper leaves
• Curling upward
• Only affects parts closest to lights

Treatment:

1. Increase distance between plants and lights
2. Reduce light intensity if possible
3. Ensure proper light height based on type (LED, HPS)
4. Monitor upper canopy regularly

Symptoms:

• Drooping leaves that feel firm/heavy
• Soil remains wet for extended periods
• Slow growth
• Possible yellow leaves

Treatment:

1. Allow soil to dry between waterings
2. Improve drainage in pots
3. Water less frequently but deeply
4. Check for root health

Symptoms:

• Wilting leaves that feel thin and paper-like
• Dry soil, pulling away from pot edges
• Slow growth
• Lower leaves may yellow and drop

Treatment:

1. Establish a consistent watering schedule
2. Ensure soil remains evenly moist
3. Consider using a moisture meter
4. For severe cases, water gradually to avoid shock