Marijuana like any plant needs care to grow and survive. If in your case you have a plant, but you have been noticing color changes in leaves or see the appearance of certain spots, it is time to find information and to know the types of spots on the marijuana leaves that are abnormal or may be indicating that the plant has a problem.
In this article we will detail each of these types of spots and we will be offering the solutions to prevent your marijuana plant from dying for not treating these spots. Let's start with yellow spots.
Yellow spots on marijuana leaves
The yellow spots on leaves that are often noticeable in different plants, always associate it with which plant is dying or wilt. And the truth is that this would be the final result if we neglect, because yellow spots on marijuana leaves is a lack of essential nutrients.
When a plant lacks nutrients such as nitrogen or iron, it usually begins to present yellow spots on its leaves. The yellow very pronounced in intensity is usually a lack of iron, it should be noted that the lack of iron is placed yellow when a blade is very new or when it is very old.
White spots on marijuana leaves
When we see white spots on marijuana leaves, it is notifying us that there is the presence of pests, such as mites and white flies. These insects feed on the sap of the leaves, leaving visible marks and, often, fine cobwebs and end up producing white spots on the leaves.
This type of spots is usually associated with fungal diseases. For example, dusty Mildee manifests itself with this spot color. Also nutritional deficiencies, such as lack of calcium or magnesium, can cause white spots.
Orange or brown spots on marijuana leaves
If your leaves of the marijuana plant have orange or brown spots, it may be going through an acute nutrient deficiency. And when the plant does not receive the right amount of lack of phosphorus it can cause dark spots, also the lack of potassium translates into burned edges and brown spots on medium or lower leaves.
If what is missing is calcium, light brown spots, circular and defined edges are noticed, especially in young leaves. In the case of magnesium, the spots appear between the veins of the leaves, giving them an oxidized appearance.
The orange spots usually happen due to the inappropriate use of fertilizers, the leaves may burn, showing spots of this color as if they had been shaped, especially at the edges. This is usually accompanied by dry or deformed tips.
There is also a plague of insects known as trips, which feed on the plant's sap and leave small brown or orange brands behind them, always appear irregularly or dispersed throughout the leaf.
Black spots on marijuana leaves
Finally, we have black spots are the most delicate because they are usually a more serious alert symptom than brown or orange spots, since they can indicate the presence of aggressive fungi, advanced pests or even a serious deterioration of the culture environment.
It is very common in homemade crops that these black spots appear due to fungal disease known as Tizón or Septoriosis, an infection that appears especially in warm and humid environments. The spots in this case are usually rounded, dark, and over time they become larger and dry, causing the leaf to wither and die from the edges to the center.
It can also be the alternariosis, which produces blackish spots with yellow or brown edges, usually in the lower leaves. Black spots can also occur by an insect plague such as cochineal, aphid or the white fly, in an advanced phase this type of plant feeds on the sap of the plant, subsequently segregating a liquid that is called molasses being adhered in the upper part of the plant.
As we have seen, spots on marijuana leaves are very common, in addition to there is a wide variety of types of spots and is where the question comes: how can I solve it?
How to solve spots problems in marijuana leaves?
There are three pillars that will help you in this process are: observe, analyze, and act precisely. And it is that in the marijuana culture market there are many products, but not any product eliminates the stain that you have effectively or is the one for this type of spot.
That is why you must first understand the origin of the stain and for this you must spend time observe. It determines whether the problem comes from a nutritional imbalance, a pest attack, a fungal disease, or an error in environmental management. Maybe just changing the place plant by the sun, humidity or constancy of irrigation will eliminate the spot of the leaves.
You should also see if the spots are in the old leaves, in the new ones, at the edges, or between the veins will help you to eliminate the stain in the best way.
Solve spots due to lack of nutrients
If the stain have already determined that it happens due to a nutritional deficiency, the first step is to check the pH of the substrate or irrigation water.
A pH out of rank prevents the plant from absorbing nutrients. To know if you are having the correct measure, on land, the pH must be maintained between 6.0 and 7.0, if the marijuana plant is in hydroponic systems, between 5.5 and 6.5.
If you measure the pH and that's fine, then it is time to correct the lack of nutrients with specific supplements. In the Cannabis culture market there are specific supplements such as calcium, magnesium or potassium. You can also use a complete fertilizer if you are not sure which is the nutrient that the plant is missing.
Eliminate nutrient excess stains
Now if the problem is the opposite and the spots come due to excess nutrients, the most effective solution is to make a root washing. For this you must remove the plant from the earth, wash the roots with abundantly pure water and pH adjusted to drag the excess of salts accumulated in the substrate.
Then, place the plant again on a different substrate and avoid using nutrients or fertilizers for a while until it recovers.
Solve stains for pests or fungi
As we saw the spots can also arise through pests, when you notice this type of spots it is time to act quickly. A thorough inspection of the underside of the sheets with magnifying glass is recommended to confirm the presence of insects.
For example, if they are trips, mites, white fly or other pests, neem oil, potassium soap or specific biological products can be used according to the type of plague you find in the store.
In general, this type of product are applications indicated by the manufacturer or by an expert in plaque treatment and are for a few days to completely control the population of insects that have generated the plague.
Now if the origin of the problem is a fungus and the spots are due to a fungal disease, such as septoriosis, Alternaria or Mildiu, you can solve it by improving ventilation conditions, reducing environmental humidity and eliminating infected leaves to stop the propagation.
You can also use an organic fungicide, such as horse tail extract, propolis, or a homemade bicarbonate solution with water and a few drops of natural soap that is quite effective.
Caring for your marijuana plants of these spots will allow you to have a successful crop and get a high quality marijuana harvest.
