During the final weeks of the flowering stage, you can expect that some of your cannabis leaves will yellow and eventually drop. Outside of the flowering stage, you may want to take this as a sign of potential problems in your crop. Growers should be able to recognize this quickly, so they can sort out the issues before they start to impact yield.
The first step is to identify the cause of the problem. It’s possible that your plants are being affected by one or more of the following issues.
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Watering practices
Cannabis plants are sensitive to the amount of water they are being provided. Too much or too little water can easily cause problems. If there is too much moisture in the soil, it can lead to root rot in time. Harmful bacteria or fungus can infect the roots; impacting the growth of your plant or even killing it altogether. Overwatering can also can nutrient lockout in the soil, resulting in nutrient deficiency and yellowing of leaves.
On the other hand, without enough moisture in the soil, the plant may be stunted. When lack of moisture is the core issue, sufficient nutrients and ideal climate won’t be enough to sustain healthy growth patterns.
It’s easy to check if this is the problem. One way is to dig into the soil (away from your plant as to not damage roots, ) and check the soil profile for moisture. It should be damp, but not saturated. For a more scientific measure, you can get a tool to record soil moisture from your local garden center.
Lack of nutrients in the soil
One of the most common reasons why plant leaves turn yellow is because they aren’t able to get adequate nutrients from the soil. If the soil was not prepped prior to planting, there are still plenty of options to solve these issues. Nutrients such as Mr. B’s line of products can provide those missing nutrients, and can be found here. You can also learn more about organic vs inorganic fertilizers.
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Diagnosing this problem can be tricky, you’ll need to consider the way the yellowing leaves occurred. Here are some of the things you will need to look for:
· Yellowing of the leaves
· Curling or crunching
· Brown spots
Any of these issues could come by themselves or in combination with one another depending on the problem your plant has encountered.
You could go as far as to test the soil or even the plant tissue by sending the media directly to a private lab. A more thorough lab report will likely ask for your chosen crop and desired yield and provide diagnostics as well as remedial actions to solve the problem and put you closer to your crops’ goal.
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pH Imbalance
Another potential problem is the pH level in the soil is too high or low. According to research from North Carolina State University, cannabis can survive a wide range of pH conditions. It can survive in a range of 5 to 7 but it performs best when grown in soil that is between 5.5 and 6.5. A simple pH test will tell you if this is a potential contributing factor for the yellowing in your cannabis plants.
Your solution to this problem will change with the medium you use to grow your plants, but there is an abundance of products specifically designed for correcting pH imbalances for typical grow methods. How you can correct pH for growing cannabis is a topic we’ll cover in an article of its own.
Growing Environment
When growing indoors, there are some environmental elements that you will need to monitor, these include:
· Type of light the plants are receiving. Like all plants, cannabis requires light to complete the photosynthesis process. If you suspect there is the problem with your lighting, check out this article which provides more details on the type of grow light your cannabis plant needs.
· Amount of heat. You’ll need to make sure that the lamp is at the right distance from the plants. But not so close that you burn the leaves. Most lights will come with recommendations from the manufacturers.
· Pests. Regularly check your plants for signs of pests or infections. The type of infection will determine how you combat it. For example, fungal problems can be solved by adding mycorrhizal fungi to the soil.
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Category: WHY
