Chemical burns of cannabis

Cannabis chemical burn treatment methods

Chemical burn , also known as " overdosing " is one of the most common problems that beginner growers face. 

At the beginning of their growing career, beginners believe that "the more fertilizer I put in, the bigger the head will grow.

As a result, the plant begins to "burn" - the leaves wither, turn yellow and dry.

Chemical burn occurs when the roots take up more minerals from the soil than the plant can absorb.

As a result, the leaves turn yellow or brown at the tips and, if excess fertilizer is not removed from the soil, these “burns” spread deep into the leaf, which becomes dried and brittle.

SYMPTOMS Cannabis chemical burn

First of all, the fan leaves suffer, they turn brown and dry, then the yellowing spreads completely to the whole plant, its death is a matter of time.

The early stage of nutrient burn can be identified by the following symptoms:

• Very saturated green leaf color;
• Yellowed ends of foliage;
• Curved leaves;
•  The branches have become dark red, purple or purple;
•  Inflorescences begin to turn yellow, and then die.

Initially, this will not appear on the whole plant. However, over time, the tips of the foliage will become charred, and the entire plant will turn yellow. When this starts to happen, immediate action should be taken.

A chemical burn may appear as brown (bronze) dots around the serrations at the edges of the leaf (often associated with problematic potassium absorption); sometimes a “curl” becomes a symptom, into which the tip of the leaf turns, bending down - this is often taken as a sign of nitrogen intoxication.

WHAT MISTAKES CAUSE CHEMICAL CANNABIS BURN?

Cannabis nutrient burn can be caused by:

1. Overdose of fertilizers;
2. Excessive watering;
3. Excessive use of flowering accelerators;
4. Frequent use of growth stimulants.

More often than not, growers burn their plants by applying too much fertilizer, especially chemicals.

Chemical burn may not occur immediately if the grower only slightly exceeds the dosage of nutrients. It usually shows up within a few days. In the worst case, it can lead to a sharp withering of the plant overnight.

If this happened during the vegetative phase, then it is best to start over from the beginning without trying to rehabilitate the plant.

With the advent of the flowering stage , the cannabis diet changes. She begins to consume more phosphorus, calcium and magnesium. An overdose of any of these substances is bound to be a disaster for the buds. They will begin to curl and subsequently deteriorate.

❗Sometimes mature plants or young shoots get burned if they grow in soil or substrate that is oversaturated with nutrients - for example, over-fertilized with fresh compost, animal droppings. Or on charged soil, for example , BIOBIZZ ALL MIX (such soil must be shed before planting ).

The use of rich soil mixtures is not recommended for seedlings.

WHAT CAN BE MISTAKEN FOR AN OVERDOSE?

POTASSIUM DEFICIENCY

The difference lies in the fact that with a chemical burn, only the tips of the leaves turn yellow and burn, and with a deficiency of potassium, the lateral edges also turn yellow.

OVERDOSE OF NITROGEN 

A phenomenon that often accompanies a chemical burn. Notice if the tips of the leaves are bent, forming something like a claw?

Do not confuse these signs with the usual drooping foliage that occurs with excessive watering.

 MAGNESIUM DEFICIENCY

Cannabis Magnesium Deficiency

 PH CANNABIS CURVE

Curve pH

EFFECTS Cannabis chemical burn

Sometimes you hear that a small chemical burn is a good sign. Like, this suggests that you gave cannabis the maximum that it can absorb.

The basis of such judgments is a very common, but erroneous opinion that fertilizers are food for plants, which means that the more food you give them, the better they grow and the more they bring.

By adding horse doses and watering with some compotes, beginners sincerely hope to grow a larger crop in this way ...

In fact, plant food is what is used in photosynthesis, i.e. light, water and carbon dioxide. Everything else is an analogue of multivitamins.

They are important for the chemical processes in the plant, but play a supporting role.

When overdosed on these "multivitamins", the newest, most efficient leaves suffer. Photosynthesis in them slows down, and plants receive less energy for accelerated vegetative growth.

Just as humans shouldn't over-fertilize their vitamins, a grower who over-fertilizes his plants is wrong to expect it to do them any good or help them grow bigger.

The leaves are comparable to solar panels.

The foliage affected by a chemical burn will not give nutrition to the bush:

Chemical burn is more harmful in the flowering phase

When a cannabis blooms, it shifts its focus from leaves and stems to flowers. This is the most vulnerable stage for cannabis because it now has less time and energy to recover from any problems.

The closer the time of harvest, the less likely it is that the plant will replace a diseased or dying leaf. Now he is not up to damaged leaves. All attention is focused on increasing the flower mass.

Also, if you over-fertilize the soil and don't flush the soil before harvesting, the buds will likely contain mineral salt residues. This will spoil the taste of the buds and you'll be lucky if the side effect of smoking is not a headache or poisoning with some kind of chlorine!

Of course, a small chemical burn will not greatly affect the health of the plants, but if the overdose continues, you can lose a lot of valuable new leaves, and this will certainly affect the overall yield.

PREVENTION AND HELP CANNABIS CHEMICAL BURN

SUITABLE FOR THE CYCLE FERTILIZER

Vegetative plants need higher amounts of nitrogen, while flowering plants need more phosphorus.

If you constantly mistakenly feed your vegetative cannabis mixture with a low nitrogen but a high percentage of phosphorus, you run the risk of phosphorus poisoning the plants!

Similarly, it is unacceptable to fertilize cannabis with horse doses of nitrogen during flowering.

DOSE

Too much dosage is often indicated on fertilizer bottles. It’s just beneficial for the manufacturer that you pour as much fertilizer as possible and buy more as soon as possible. Consider the recommendations on the label as the LIMIT dosage. Start with half the dose and increase it only if you see it is necessary.

SPILL WITH CLEAN WATER

COMPOTE - COMPOTE - WATER.

THIS IS THE LAW .

Three compotes in a row - salting the soil. Verified by myself.

If your plants are manually watered (any non-hydroponic system), rinse the planting with clean water at the right pH.

If you manage to wet and rinse all the soil, after a while the plant will no longer suffer from a burn. Affected leaves will not recover, but the problem will stop spreading.

For hydra:

✅ Add neutral pH water to the hydroponic tank

In a hydroponic setup, add neutral pH water to the reservoir to lower the fertilizer concentration. You can pour out the old water and make the mixture again. This time, you will need 2 times less fertilizer than before.

In the hydroponic method, abrupt changes stress the plants severely, so it is recommended to do everything smoothly and not completely cancel the fertilizer in the water composition!

✅Rinse the tank and all connecting pipes to get rid of all nutrients. Then change the solutions to clean water for irrigation within the first hour and then start raising the ppm level from lower values ​​on the 1/1000000 scale.

The great benefit is that such washing should be done every two weeks and the solutions should be changed regularly for new ones. This is necessary to protect your entire system from bacteria and keep your plants with a good supply of fresh fresh water.

A good rule of thumb is to maintain the correct ppm (  parts per  million) for each phase of your plants' development:

• Seedlings: about 50–150 ppm 
• Unrooted clones: about 100–350 ppm 
• Young plants: about 400–800 ppm 
• Large plants: about 900–1800 ppm

✅Two different plants fertilized in the same way can show symptoms of opposite disorders: chemical burn in one plant and mineral deficiency in another - such drastic differences in needs are more often seen in hydroponic cultivation. In addition, the temperature and humidity of the growing area affects the absorption of minerals.

✅ Hydroponic growers need to use a device called a TDS meter, with which the chemistry of your fertilizer irrigation water (or hydroponic tank mix) can be reliably known and controlled.
In order to avoid problems with outdoor factors, it can be grown indoors .

*All information provided is for informational purposes only and is not a guide or call to action. All materials are taken from the Internet.