How to get more yield from your cannabis plants

Genehtik / Cannabis growing  / How to get more yield from your cannabis plants

How to get more yield from your cannabis plants

Most outdoor and indoor growers are always concerned in obtaining a higher yield in their cannabis plants, looking for an increase in the weight, quality and quantity of the bud productions.

We should bear in mind that outdoor growing has certain climatic parameters, (humidity, air, temperature, hours of sunlight, rain, etc.) which are difficult to control as they depend on the type of climate and place they are grown in.

Knowing this information we could choose which type of cannabis plants (indica or sativa) will be the most suitable ones to be grown in that place.

You can find more information in our blog about the characteristics of the different types of cannabis plants.

Aumentar la producción en un cultivo de marihuana

Indoor and Outdoor growing



Indoor growig


Next we’ll share some details with which you can increase the cannabis plant productions whether grown indoor or outdoor:

Indoor and Outdoor growing

Select cannabis seeds and genetics of a higher range

It is a very important factor to choose the type of cannabis seeds since not all the genetics have the same characteristics. We always recommend germinating a few more seeds because it is possible that all may not grow equally and hence we could select the best ones.

Semillas de marihuana Genehtik
Los híbridos modernos suelen ser criados para aumentar la producción de la planta, así como aumentar su potencia, sabor o aroma.

You can start growing with a seed or with a clone, but in our opinion the seed has more advantages such as a more developed, stronger and sturdier root system, which will impact positively on the plant providing a fairly bigger plant with more sprouts and buds.

We think that growing from a seed will always give us a more homogeneous growth and a higher yield.

The seed banks also make new hybrids for better productions increasing the power, taste and flavour of the strains. The seed banks always guarantee the quality of the seeds so that the grower doesn’t face any problem.

Our most popular strain is the KRITIKAL BILBO

Semillas de marihuana Kritikal Bilbo

Different types of pruning cannabis plants

There are different methods of pruning cannabis plants to get a maximum yield and a higher production.

The purpose of pruning is to control the growth and the height of the plant making more and stronger branches. It also helps the plant to ramify allowing the light to go through more easily.

There are various pruning techniques. However, we will focus on the ones most commonly used: apical pruning, FIM pruning, pinching off and super cropping.


Topping (apical pruning)


This pruning controls the height and growth of the plant. It consists of cutting off the uppermost tip of the main stem which stops the plant from growing, and at the same time boosts the growth and production of the lower branches into large numbers of stronger branches.


Poda apical en planta de marihuana

This pruning must take place always during the growing period making sure that the height of the plant will be the desired outcome, taking into account that it will only grow in width. Therefore cutting this tip, the auxins (a class of plant hormones or plant-growth regulator) spread through the rest of the branches of the plant competing amongst them to become the main new stem.

Due to this rivalry, the auxins focus on the tips of the branches increasing the vigorousness and plant production with more buds.

Keep in mind that the cut must be done as neat as possible with a knife or a pair of scissors previously sterilized avoiding infections and having a quick recovery.


Fimming (FIM pruning)


This method owes its name to the acronym FIM (Fuck, I missed.)

Similarly to the apical pruning it must always take place in the growing stage.

With this pruning we also control the height, growth and the branching of the plant. The aim of this technique is to multiply the main and lateral sprouts without sacrificing the upper sprouts.

Poda FIM para planta de marihuana
It consists only in cutting 80% of the uppermost tip of the main stem. Between 2 and 5 tips should appear after a few days. It is less stressful than topping, giving more auxins and a more natural growth to the plant.

We can apply this method without any restrictions to obtain several tops. We must remember to make a neat cut with sterilized scissors or knife to avoid infections.

Poda FIM plantas de marihuana
Here we can see the result of a FIM pruning

Pinching off


This pruning is quite similar to topping in which, instead of cutting off the uppermost tip of the main stem, we have to only pinch it off with our fingers.

With this method the growth of the plant slows down in height boosting the growth of the other branches.

We can apply this technique to different stems and branches of the plant obtaining more sprouts (without sacrificing the upper sprout), more buds and a higher yield of the plant.

We must use this pruning in the growing period or in an early flowering stage.




Super cropping is a high stress training method (HST) which gives bigger yield.

It consists in bending the stems or branches without breaking them. In other words, we damage the inner tissue of the plant not causing any damage to the outer layer, and gently bending this towards the direction that we would want it to grow allowing a good light penetration to the crop.

This technique can be used in the growing period as well as in the flowering period, except for when the buds have already reached a significant size in the last stage of the flowering period.


Fertilizers for growing cannabis plants

In the market there are several kinds of nutrients, stimulators and boosters specifically created to get bigger yields of cannabis plants.

The cannabis plants must always be given what they need at every stage of their optimal developments.

We have to give them the right amounts of nutrients because otherwise over-fertilized plants won’t develop correctly. The manufacturers usually provide us with a dosage chart which helps with an optimum growing of the plants.

There are two kinds of fertilizers: mineral and organic, which have different compositions and tasks; growers need both of these.

They are classified as: base fertilizers for growth, base fertilizers for flowering, root stimulators, soil stimulators, growth stimulators, flowering stimulators and boosters. Mineral fertilizers provide high amounts of nutrients that plants need in order to grow strong.

The absorption of these by the plants is instant and direct, whereas the organic fertilizers must first be decomposed so that subsequently the nutrients are absorbed by the roots of the plants.

Organic fertilizers contain organic carbon which is an essential element for obtaining a healthy soil. To get a successful result, at the end we must water wash the roots of the plants.

Our fertilizers, stimulators and boosters Genehtik Nutrients are the best for your cannabis plants.

Abonos y estimuladores Genehtik Nutrients

PH adjustment

PH is a scale of acidity from 0 to 14. It tells how acidic or alkaline a substance is. More acidic solutions have lower pH and more alkaline solutions have higher pH. Substances that aren’t acidic or alkaline (that is neutral solutions) usually have a pH level of 7.

In the rooting stage the ideal pH level should be between 5.5 and 5.8, in the growing stage it should be 6 and in the flowering stage it should be between 6.3 and 6.8.

Maintaining an optimum pH will allow the plants to absorb and metabolize the nutrients, increasing the yield of the crop with better healthier growth.

However, an incorrect pH level can be the responsible of a lesser production.

Check out more about our  PH regulator.

Regulador de PH Genetik Nutrients

Next we’ll share some details with which you can increase the cannabis plant production growing indoors.

Indoor growing

Optimizing conditions in the grow room

The growing area must always be kept clean maintaining the appropriate parameters such as the temperature, humidity, air renewal and light intensity.

We should set these up depending on the different types of cannabis strains and according to their different growing stages (rooting, growing and flowering). There are climate controllers specifically created for growing cannabis which help control these parameters automatically.

It is also necessary to always adjust the pH level, have an adequate fertilizer dosage and a correct water frequency in the crop.

We must constantly follow all the guidelines because any disorder of these may cause a loss in the crop production.

Air circulation in the grow room

Constant air circulation and fresh air renewal are essential for maintaining an optimal temperature (ideally between 20ºC and 28ºC) for a healthy plant growth.

Adequate ventilation is also crucial for the gas exchange (within oxygen and carbon dioxide) which comes from the photosynthesis process.

In the grow room the oxygen and the carbon dioxide are consumed very quickly, therefore they will have to be renovated with an appropriate air extraction system, bringing in the fresh air and removing the heat from the lights. In addition, to have a better air flow one can also use oscillating fans but never directly on the buds.

Controlling humidity

Humidity control in the grow room plays a very important factor in obtaining better and bigger yields.

In every different stages of the plant growth there must be an optimal grow room humidity level; rooting of around 60-70%, growing of around 50-60% and flowering of around 40-50%.

la humedad en la marihuana

Excess of humidity (above 70%) in the grow tent can cause mould which may lead to bud rot and diseases like botrytis, powdery mildew, etc. High humidity also blocks the stomata (tiny pores in the surfaces of leaves that are used for gas exchange) and reduces the carbon dioxide intake. In fact, very moisture plant roots usually lose their natural ability to take up water, slowing down the plants’ nutrients uptake. However, low humidity (below 40%) also provokes the shut out of the stomata.

Therefore the plants transpire water more rapidly through the leaves than what the roots can supply them, causing an extremely slow growth of the plants (one of the most common low humidity symptoms). Furthermore, when low humidity is added to high temperature and dry conditions, it can create an appealing environment for pests such as red and white spider mites.

Adequate ventilation is often the most practical method for controlling humidity, but there are also specific humidifiers and dehumidifiers in the market which can help in maintaining the correct humidity at all times.

Light intensity

The light is another extremely important factor for growing cannabis successfully.

In the growing stage it is advisable to have a light period of 18 hours and a darkness period of 6 hours (18/6). After completing this stage, to start the flowering period we must change to a cycle of 12 hours of light and 12 hours of darkness (12/12).

This manipulation of light darkness cycle provokes the florigen (flowering hormone) production to increase in the cannabis plants. This hormone is created by the plants when the days are shorter and the nights are longer.

In the flowering period, during the photosynthesis process the cannabis plants use the light energy to convert carbon dioxide and water into carbohydrates (sugars) which are necessary for higher bud growth. The energy of light is absorbed by chlorophyll whereas air containing carbon dioxide and oxygen enters the plants through the leaf stomata.

A high intensity grow light and an efficient reflector (which helps maximize the light effectiveness) are needed in the grow tent to obtain bigger and healthier yield. Ever since Thomas Alva Edison invented the light bulb, manufacturers have always been searching for the most efficient energy lighting system. Today there are various types of grow lamps with powers of between 250W and 1000W, and also there are different kinds of lighting systems such as fluorescent, light emitting diode (LED), high intensity discharge (HID), etc. Nowadays the most commonly used HID lamps are the 600W high pressure sodium (HPS). Growers have still not been able to come to an agreement whether the power of this HPS light bulb should be 600W or 1000W. However, to get a significant harvest it is recommendable not to use less than 400W.

Lamparas de sodio para marihuana

Distancias recomendadas

Another parameter to take into account, according to the different lighting systems and the different powers of each bulb, is the distance between the grow lamp and the height of the plant. If this distance is very long the plant will become extremely lanky, whereas if the distance is shorter than the adequate one, the tip of the plant might get burnt.

A point of reference for a 600W HPS bulb is the distance of approximately 50cm. What actually makes the difference is the maximum temperature on the upper tip of the plant, which should be of around 28ºC. Note that with a temperature higher than 28ºC this distance will have to be lengthened, whereas lower than 28ºC the distance could be shortened.

The flow of light (AKA luminous flux or luminous power) is the amount of brightness continually emitted from a light source which is measured in lux or lumen/m2. A light meter or a lux meter is the device used to measure the adequate light flow in every stage of the plant growth.

The most advisable brightness for the rooting stage is between 5000 –7000 lux, for the growing stage it’s around 40000 lux (preferably not less than 15000 lux and not more than 70000 lux) and  for the flowering stage it’s around 60000 lux (preferably not less than 35000 lux and not more than 80000 lux).

The light meter also indicates when the bulb should be replaced with a new one.


Growing method SOG (Sea Of Green)

The SOG method is the most commonly used to obtain the maximum yield per square meter with minimum energy consumed in the least time possible.

tecnica de cultivo de marihuana SOG, sea of green o mar verde
This technique forces the start of the flowering period by changing the light cycle 12/12 in the early growing stage, when the plants are 25-30 cm. tall (10-12 inches).

A higher number of plants (usually 25 plants per square meter) and the lack of space in the grow room oblige their vertical growth, creating a kind of uniform and homogeneous green carpet.

tecnica de cultivo de marihuana SOG, sea of green o mar verde
The average yield per plant with this method is lower than the traditional form of growing. However, the entire yield of the grow tent is unbeatable. The SOG technique seeks to get a large apical bud in each main stem of every plant, achieving the biggest harvest in the quickest way.

It’s very important to always germinate seeds only from one same strain, preferably stable high quality feminized indica seeds with uniform growth in height or high quality feminized sativa seeds with an indica structure from inbred hybrids.

From cannabis seed bank we recommend the KRITIKAL BILBO, the NORTHERN LIGHTS X, the OG LEMON BILBO and the SANTA BILBO for SOG growing; all these are available in packets of 25 seeds.

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