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marijuana leaves turning white

Marijuana leaves turning white

• Don’t let plants dry out often.
• Avoid nutrient lockout by NOT overfeeding.
• Don’t let humidity levels drop below 25%.
• Use well-draining, aerated soil.
• Add generous amounts of apples, bananas, broccoli, and chickpeas to your compost pile.

• Hit the pH sweet spot.
• Flush the growing medium and add an iron supplement afterwards.
• Use a small amount of nitrogen fertiliser to lower pH and make iron more accessible.
Immobile nutrients remain locked in place and plants cannot redistribute them. For example, if a zinc deficiency takes hold, the signs will first show in the newer growth as the plant can’t relocate its mineral stash.

• Imbalanced pH often underpins manganese deficiency. Frequently measure your soil pH and keep it within the optimal range to ensure your plants can access this mineral.
• Make a manganese-rich compost by adding pineapple, tomatoes, cranberries, and carrots to your pile.
Manganese doesn’t receive too much attention in the world of cannabis growing. However, this immobile micronutrient plays a fundamental role in cannabis physiology. It aids photosynthesis, respiration, nitrogen assimilation, and root cell elongation, and protects roots from bad microbes.
Manganese deficiency will show up as light green discolouration near the base of new growth. This eventually spans out to the tips, and brown spots begin to emerge.
• Add dolomitic lime/garden lime to the growing medium.
• A pH of 6.2 provides the best environment for calcium uptake.
• Add plenty of eggshells to your organic compost.
• Keep a worm farm! Worm castings provide loads of nutrients, including calcium.
Phosphorus also acts as a macronutrient in the cannabis plant. Being a mobile nutrient, plants can direct the mineral to the areas that need it most. Phosphorus plays an essential role in photosynthesis and protein synthesis, and it’s a crucial component of DNA. Phosphorus deficiency can manifest as red/purple stems, brown spots on leaves, and dry leaves.
• Be careful when using fertilisers. Feeding your plant too often can cause salt to build up and interrupt potassium uptake.
• Bolster your compost with hardwood ash and kelp meal.
• Don’t overwater.

• Flush the medium with 6.0 pH water if pH is out of balance.
• Epsom salts also provide magnesium. Add 1–2 teaspoons of Epsom salts to about 4l of water and apply until symptoms resolve.

Cannabis nutrient deficiencies can slow down your grow and negatively impact yields. Learn how to prevent and cure all of them using this guide.