How to detect phosphorus deficiencies in cannabis growing?

Written by on 15 April, 2022

When you grow your own cannabis, you need to know that your marijuana plants need certain elements such as watering, lighting and the right nutrients to grow smoothly, so you need to keep a close eye on your growing in case there is a failure.

As far as the nutrients there are three that are basic and very important for your plants, nitrogen (N), potassium (K) and phosphorus (P), precisely on this last one we will speak to you in this post, follows with us and knows how to detect the deficiency of phosphorus in your plantation.

What is the function of phosphorus?

Like other nutrients, cannabis plants need phosphorus to develop properly. This nutrient is vital, in the stage of bloom (in addition to the potassium) to produce bigger and denser heads. It also helps to stimulate the development of the roots.

The phosphorus also has an important role in the photosynthesis. The defense of this nutrient is produced when the plants of cannabis do not receive the quantity that they need to obtain an optimal growth, as consequence your plants will grow weak and vulnerable to the attacks of insects and mushrooms.

Signs or symptoms of a phosphorus deficiency

The symptoms of phosphorus deficiency are several; here we will present some of the most common.

Generally, when there is a deficiency of this nutrient will begin to affect the older leaves that are at the bottom of the plant, you will notice how they will begin to change color to a darker green or blue tone, also will present spots.

The stems may turn a purple or reddish color. In addition, the leaves may also become very dry and thick.

Final considerations

One of the causes for which your cannabis plants can have difficulties to absorb this nutrient, is when the means of culture has an inadequate pH, if it is grown in the ground this one, should be between 6.0 or 7.0. You can use some special products to modify the pH.

Overwatering marijuana plants can also be a cause of phosphorus deficiency. Be sure to maintain adequate watering. Allow the soil to dry out before watering again.

Before you get alarmed when you see some changes in the color of your plants, it is ideal to bear in mind that some cannabis varieties, due to their genetics, tend to have reddish or purple tones. Therefore, it is necessary that you be well informed about the characteristics of your plant.

In addition, make sure that the real cause of the change of your plants is a deficiency of phosphorus to avoid making mistakes in your plantation. Keep an eye on your plants constantly so that you can detect any irregularities in time.





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