Marijuana Leaf Health Guidelines: Signs of Stress, Disease, and Other Problems

There are many quirky signs to reveal if a marijuana plant will make it through the plant life cycle, but not everyone has the expert eye to catch the deficiencies like we do. That’s why we’re here! 

When growing cannabis, you need to identify the different signs of marijuana leaf health by looking at the leaves and have an understanding of the dense nutrients plants need to survive.

The healthier a plant looks, the less you have to worry about it needing certain nutrients. We know all about increasing your yields by identifying the signs of marijuana leaf health for you to have the best growth possible! So grab a cup of coffee and settle in while we dissect the signs you need to look out for. 

What Are The Essential Nutrients For Marijuana Plants? 

There are many nutrients cannabis leaf plants absorb from their tiny seeds to voluptuous leaves. You’ll need to understand these to know what makes a weed plant grow.  

There are two key types of nutrients: micronutrients and macronutrients

Let’s dive into these robust nutrients.


These are primary nutrients consisting of nitrogen, phosphorus, and potassium alongside their secondary nutrients. 

The secondary macronutrients involve calcium, magnesium, and sulfur, to name a few. 


These are the primary set to keep a sustainable plant growth such as: sulfur, magnesium, and calcium. 

After these, you have iron, molybdenum, zinc, manganese, copper, and boron. There are a ton of other nutrients, as we mentioned earlier. 

Grab a pencil, if you haven’t already, because you will need to write all these down so you can win in the growing of these amazing, gorgeous plants. 

What Are The Symptoms Of Marijuana Leaf Health Deficiency? 

There are symptoms of marijuana leaf health deficiency to look out for during your fun growing journey. Yes, you can discover deficiencies by identifying the health of the leaves to see what nutrients they are missing. Then you can brag to all your friends about your top-tier knowledge! 

Marijuana Leaf Health Signs

  1. Boron: When you encounter plants with a boron deficiency, you’ll get thick growth tips and brown to yellow spotting on new leaves. If your plant is not getting enough boron juice this can lead to slow or abnormal growth of its top leaves. 
  2. Nitrogen: If your marijuana plants look yellow or brown, it can be a sign it’s not getting enough nitrogen. The green part of a plant comes from nitrogen as it’s a part of the photosynthesis cycle. 
  3. Phosphorous: To diagnose your plants with phosphorus deficiency, you can identify if the leaves have brown spotting, stunted growth, and if the new leaves are small. Add more if this is a problem before you pay funeral costs for the plants. 
  4. Potassium: Leaf signs of potassium deficiencies will show brown tipped leaves that look a little burnt. The internal vein of the leaves will still show a normal green color while the outside is browning and the sides of the fan leaves are yellow. 
  5. Calcium: When identifying for calcium deficiency, you may notice dead brown spotting, crinkling, hindrance growth, distorted leaves, and curled tips at the end. 
  6. Magnesium: During your plant check-up, if you see a fade from green, pale green, to yellow, your plants might need more magnesium. 
  7. Sulfur: The leaves turning yellow in the middle is a sign it can use some sulfur in its plant life.
  8. Copper: When your plant isn’t getting enough copper, it will turn dark with blue and purple coloring. 
  9. Iron: Marijuana plants may have an iron deficiency if the leaves appear yellow to the naked eye. 
  10. Manganese: The leaves will turn yellow and quickly brown before dying off. 
  11. Molybdenum: Leaves will turn orange, red, or pink and have unsightly spotting. 
  12. Zinc: The plant not getting enough zinc will show yellowing between the veins and the base of the leaf. 

Aside from these nutrients, you’ll need to understand the plant’s life cycle.

Learn more: A Guide to Main Weed Plant Stages

How Do Plants Grow Smooth Leaves For Full Health?

A plant will always need a large amount of potassium, nitrogen, and phosphorus to grow healthy roots, flowers, and leaves. 

It’s important to make sure you get those nutrients going all week long to avoid any unhealthy leaves. But make sure you don’t give it a nutrient burn by delivering too many nutrients.

Learn more:  How Flushing Cannabis Supports Plant Health

What You Can Expect When You’re Ready To Harvest? 

When you’re nearing the end of the plant’s life cycle, you will need to stop giving it nutrients for the last week. 

You don’t want to add more nutrients since it’s almost done growing the fruit from your long and tedious labor. The marijuana leaf health of the plant should be vibrantly green with some orange pistils and trichomes surrounding the stem and leaves.

These pistils and trichomes are a sign of beauty and you could enter the plant into a beauty plant model competition!  

You want your plants deep green and thriving because without the green appearance you are in a heap of trouble. If not taken care of immediately, the plants will die off and head to plant heaven. 

You can get started on growing amazing plants by contacting us at Comprehensive Cultivation Services.

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