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what nutrients do weed plants need to grow

What nutrients do weed plants need to grow

Despite its importance, potassium deficiencies are common. If you use a natural fertilizer such as bat guano, please note that potassium is the least abundant nutrient of the big three. Fixing major deficiencies requires a water-soluble fertilizer high in potassium.

If you think that nutrient options are confined to marijuana plants that grow in soil, you are wrong! There are also a variety of hydroponic options, which tend to muddy the waters for the uninitiated. But fear not! We’re here to provide an easy guide to selecting the best nutrients for growing marijuana and producing fantastic yields.

Immobile nutrients stay in the same place once the plant assimilates them. You will spot signs of immobile nutrient deficiency in young leaves near the plant’s top and outer branches.

Magnesium (Mobile)

The first three nutrients listed above – Nitrogen (N), Phosphorus (P), and Potassium (K) – are the most crucial. If you purchase a bag of nutrients from a store, you should notice an N-P-K ratio listed on it.

The macronutrients required for plant growth are:

Your marijuana plants only need a tiny amount of molybdenum, which means a deficiency in this micronutrient is rare. It plays a role in a pair of important enzyme systems that convert nitrate to ammonium.

What Elements Does a Marijuana Plant Require for a Successful Growing Cycle?

Although sulfur deficiencies are uncommon, they can occur if your fertilizer or soil doesn’t already have enough of it. Sulfur is an essential nutrient because it helps plant respiration and the synthesis and breakdown of fatty acids. If your soil or water has an excessively high pH, it could result in phosphorus loss. This is a major cause of sulfur deficiency.

Many novice growers are unaware that there are ‘mobile’ and ‘immobile’ nutrients. There are also primary, secondary, and micronutrients. The difference between mobile and immobile nutrients depends on whether they can be translocated once the marijuana plant assimilates them.

What nutrients do weed plants need to grow


When it comes to growing cannabis, the type of nutrients we use play a major factor in determining the level of sustainability that is reached. There are so many elements on earth, from land or sea, that can be used to grow a cannabis plant from seed to harvest. This can be obtained in many ways but the moist sustainable way, is using amendments that are made up of earthly compounds and introduced through the soil. There are many elements and nutrients that are vital to the growth of a cannabis plant but below you will find the 5 nutrients that are an absolute necessity for growing a sustainable crop and the organic elements that are used to introduce this to the plant.



Nitrogen is by far one of the most essential nutrients of the cannabis plant. It is so crucial because it is an integral part of chlorophyl and is key in the process of photosynthesis. Plant tissue is also made up of mostly nitrogen, which is why you will quickly see signs of deficiency when there is an absence of it. For a plant to feed itself and grow, there must be a readily available source of nitrogen within the soil or grow medium. Some of the most popular organic elements that are used for nitrogen supplementation include alfalfa meal, blood and bone meal, cottonseed meal, chicken manure, feather meal, fish meal, bat guano, worm castings, and many other natural resources.

Magnesium is one of the most important secondary macronutrients because it is an element that your plant needs in all stages of life in fairly large quantities. This element is most presently in the leaves and has an immediate impact on the plants ability of light absorption and creating sugars and carbohydrates. Magnesium also plays a crucial part in transforming light into energy. Some important organic resources of magnesium include dolomite lime and Epsom salts.


Potassium, the 3rd macronutrient, next to Nitrogen and Phosphorus, is another important catalyst in the cannabis plant. Although the presence of potassium is very limited in the plant tissue, it interacts with nitrogen and participates in the compound of proteins and amino acids. During periods of drought, it improves the resistance of plants and is the main component to the strength of plant tissues. Potassium also works in conjunction with phosphorus to improve the strength and resistance of the root structure. It also plays a major role in the increase of mass, density, and volume of the buds. The most used potassium organic material include compost, kelp meal, greensand, sulfate of potash, and wood ashes.