CalMag Concentration

I asked Gemini to weigh in on the subject and here is what it spit out:

The ideal calcium concentration in the nutrient solution for growing cannabis in coco coir in autopots is generally between 100-200 mg/L.

Here's why this range is considered optimal:

  • Calcium's Role: Calcium is essential for plant cell wall structure, nutrient uptake (especially potassium), and overall plant health.  
  • Coco Coir: Coco coir has low natural calcium levels, making supplementation crucial.  
  • Autopots: These systems rely on precise nutrient delivery, making it important to maintain the correct calcium concentration.

Important Considerations:

  • Magnesium: Calcium and magnesium work synergistically. A balanced Ca:Mg ratio (around 2:1) is ideal for optimal plant growth.  
  • pH: Calcium availability is influenced by pH. Aim for a pH range of 5.5-6.5 in your nutrient solution for optimal calcium uptake.  
  • Nutrient Solution: The specific calcium requirements may vary slightly depending on the nutrient brand and feeding schedule you're using. Always refer to the manufacturer's recommendations.
  • Monitoring: Regularly monitor your nutrient solution's calcium levels using a reliable testing kit. Adjust your nutrient solution accordingly to maintain the desired range.

Signs of Calcium Deficiency:

  • Stunted growth
  • Weak stems
  • Blossom end rot (in fruits)
  • Leaf tip necrosis

The ideal magnesium (Mg) concentration in the nutrient solution for growing cannabis in coco coir using autopots is generally considered to be in the range of 35-70 mg/L.

Here's why:

  • Importance of Magnesium: Magnesium is an essential macronutrient for plants. It plays a crucial role in photosynthesis, chlorophyll production, and enzyme activation.  
  • Coco Coir: Coco coir can sometimes have a tendency to bind magnesium, making it less readily available to the plants. Therefore, slightly higher levels of magnesium may be necessary compared to other growing media.  
  • Autopots: Autopot systems provide a consistent and controlled watering environment. This can help ensure that the plants receive a steady supply of nutrients, including magnesium.

Important Considerations:

  • Nutrient Solution: The ideal magnesium concentration will depend on the specific nutrient solution you are using. Always follow the manufacturer's recommendations as a starting point.
  • Plant Stage: Magnesium requirements may vary slightly depending on the stage of plant growth (vegetative or flowering).  
  • Monitoring: Regularly monitor your plants for signs of magnesium deficiency (chlorosis between leaf veins) or toxicity (marginal necrosis). Adjust your nutrient solution accordingly.
  • Water Quality: The quality of your water source can also influence the magnesium concentration in your nutrient solution.

I would like to hear what you guys think of this...