Nutrients Simplified: Understanding N-P-K and Feeding Your Cannabis

Cannabis needs three primary nutrients to thrive: Nitrogen (N), Phosphorus (P), and Potassium (K). Learning what each does and how to feed your plants properly can make the difference between a healthy, vigorous plant and one that struggles.

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🌿 The Big Three Nutrients

1. Nitrogen (N) – the growth booster
   • Helps leaves grow green and strong.
   • Most important during the vegetative stage.
   • Deficiency signs: yellowing leaves, slow growth.
2. Phosphorus (P) – the energy driver
   • Supports root development and flower formation.
   • Most important during flowering.
   • Deficiency signs: dark, purplish leaves or poor buds.
3. Potassium (K) – the all-around helper
   • Strengthens stems, improves water absorption, and helps buds flourish.
   • Needed throughout the plant’s life.
   • Deficiency signs: weak stems, brown leaf edges, poor yields.

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🌱 Feeding Basics

• Seedlings: Usually need little to no extra nutrients. Gentle feeding or nutrient-free water is often best.
• Vegetative Stage: Feed higher Nitrogen to promote lush green growth.
• Flowering Stage: Reduce Nitrogen and increase Phosphorus and Potassium to support buds.

Pro Tip: Start with half the recommended dosage on fertilizer labels and gradually increase. Overfeeding is easier than underfeeding to correct, but still avoid nutrient burn.

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⚠️ Common Mistakes

1. Overfeeding: Causes burnt leaf tips and stunted growth.
2. Feeding too early: Young seedlings are sensitive—wait until 2–3 sets of true leaves appear.
3. Ignoring pH: Even perfect nutrients won’t absorb if the pH is off.

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🌟 Pro Grower Gems

• Use liquid nutrients for faster uptake or slow-release soils for less frequent feeding.
• Rotate feeding and flushing cycles to prevent salt buildup.
• Observe your plant—yellow leaves, drooping, or burnt tips are signals your feeding plan needs adjusting.

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Feeding properly sets the stage for strong growth and fat buds. Combined with proper watering and medium, your plants will thrive.