Close this search box.

The best weed fertilizer for your marijuana home grow.

For the cultivation of marijuana, you need three basic things, good soil, water and lots of light. 

The next step would be purchasing good fertilizers so that the crop grows large and healthy. In addition to taking into account that improper use of these products could also disrupt your home grow, the objective should be to provide the necessary nutrients for our plants to grow and develop vigorously but without damaging the soil.

We must know the operation and application of fertilizers in cannabis for proper use.

Weed fertilizers basics for the beginner grower

Fertilizers sold for cannabis are mixtures of a concentration of minerals that the cannabis plants need. Normally, these concentrated fertilizers should be diluted perfectly in water and in the correct proportions that the manufacturer advises us. 

We must also bear in mind that a larger pot will distribute more marijuana fertilizer evenly; therefore, smaller pots will need more fertilization frequency as nutrients are more quickly absorbed by the roots. Another fact that you should know is not to put more food to get the plants to grow faster. It’s important to follow the manufacturer’s recommendations on quantities, and many products provide feeding tables to help with programming. We will try to provide links to feeding tables for all suggested brands.

Knowing when a plant needs to be fed is very important, looking closely at the plant or collecting a sample of NPK from the ground may be options. If the leaves look a strong green, it is most likely not missing, although the deficiencies can be seen up to fifteen days later. Clearly, if the leaves stop growing or have a pale yellowish hue, it clearly needs to be fertilized. 

Some people feed the plants every time they water, others once a week and others when they see fit, so being alert and observing changes in the plant like many experienced growers is a good way to learn and control when Plants need some kind of food.

Excess marijuana Fertilizer

Too much fertilizer is quite common among growers, and this creates a toxic soil due to the accumulation of too many nutrients, in indoor crops, this is more common as it has less soil volume. You must clean the roots and soil to the fullest. You can leach with solution diluted in water and in large quantities. After a week, if we have cleaned them well, it should be enough for the plants to start looking better. After the washing was recognized on the leaves, we could resume feeding the plants.

NPK, Nitrogen (N), Phosphorus (F), and Potassium (K)

NPK means the three elements and they are always represented in the packages of the commercial fertilizers. In fact, these will have a numbering that means the percentage of each element in the fertilizer. To know the relationship of NPK, we must look at the numbers that the fertilizer container will carry. That is to say, if you use 12-10-6 it would mean that its nitrogen content would be 12, that of phosphorus 10 and that of potassium 6.

The balance between these elements that the plant will need and in different proportions is very important if we are in growth or flowering. Fertilizers for cannabis are made for growth and flowering. In this last phase, more potassium and phosphorus are required if we want to obtain large, loaded and tight buds. It’s a good idea to get a deficiency chart easily available on the internet, and thus identify the symptoms knowing what kind of elements we may need to get a great harvest in terms of quality and quantity.

Here is a list of some recommended brands categorized by the two core cultivation phases.

Vegetative – Growth Phase & Bloom – Chunking up the buds Phase

Fox Farms



General Organics






Hawaiian bud



Good Stuff Grow



Top Articles

Growing Cannabis in Canada

Growing Cannabis in Canada: A Comprehensive Guide

Since the legalization of cannabis in Canada, a growing number of Canadians are exploring the possibility of cultivating their own cannabis plants. Whether for personal use or commercial purposes, understanding the legal landscape, cultural methods, and potential rewards and challenges is essential.

Read More »
Growing weed Outdoors

A quick guide to Lollipop for indoor weed growing

pruning makes a lot of sense in growing weed indoors. This is mainly due to the way in which artificial light shines on the plants from above in a growing room. The dense foliage covers a lot of light and the lower branches and leaves grow largely in the shade.

Read More »

Table of Contents