Indoor marijuana growing

Tips and advices for a successful indoor cannabis crop.

Humic and fulvic acids for cannabis plants

The use of humic and fulvic acids is becoming increasingly popular among all types of cannabis farmers, who can now take advantage of a healthy, rich and living soil that produces happy plants and therefore abundant harvests. Thanks to this substances, nutrient uptake and management are much more efficient, and root growth is simply spectacular.

Either if you’re using organic soil or hydroponic systems, using  humic and fulvic acids is a very easy way to ensure the best possible conditions for the roots of your plants. Indeed, it is especially recommended in hydroponic cultivation since these types of growing media do not contain nutrients nor microbial life. In this way, you get the most out of the nutrient solution that you’ve carefully prepared for your plants.

Quality soil produces quality flowers

Quality soil produces quality flowers

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Pruning Cannabis Plants

In this series of posts we’re taking a comprehensive look at a range of techniques used by growers to shape cannabis plants and facilitate cultivation. Pruning and training are essential tools to control the way our plants grow, whether to restrict height, maximise yields or as a management tool for the indoor cultivator trying to control multiple varieties in one grow space.

This plant was pruned multiple times

Pruning plants is a great way to maximise flower sites

When discussing these techniques, we can essentially split them into two basic types of method:

  • Destructive pruning methods that effect some kind of damage on the plant, like pinching out, FIM, super-cropping etc.
  • Non-destructive training techniques designed to minimise damage, such as LST (Low Stress Training), SCROG, etc.

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EC meters for cannabis cultivation

EC meters are a very useful tool when growing cannabis since they allow growers to have full control over the nutrition of their plants. Today, with tens of nutrient brands offering their own formulations, it may be difficult to find the correct dosage for your plants, especially when nutrients or additives of different brands are mixed. Well, with the help of an EC meter you can easily check the exact amount of nutrients contained in your nutrient solution, which, as you’ll see in this article, makes things a lot easier.

Using pH and EC meters is recommended to achieve best results

Using pH and EC meters is recommended to achieve best results

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Flowering in Cannabis plants

Cannabis plants go through different stages of life before reaching harvest. These stages are: germination, pre-growth, growth and flowering. Depending on the phase of life, the care and feeding required can vary greatly, in this case we’re going to focus on the flowering period of cannabis and the changing nutritional demands upon our plants.

Plant life cycle

Phases of plant life

Pre-bloom phase of cannabis after the photoperiod change

At this point in their life cycle the plants are growing well, they’ve already occupied a little over half of the available space, and now is the moment to change the timer, so instead of using 18/6 we will switch to a 12/12 photoperiod and induce the plants to flower.

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Substrates for growing cannabis

Cannabis plants have a remarkable capacity to adapt to the environment they grow in, a great advantage for us growers as it frees us to select the type of substrate best suited to our needs from the wide range available on the market that serve perfectly as growing media for cannabis.

In this post we will look at the different substrates and the variants of each of them, highlighting the fertilisers to be used and the peculiarities of each substrate, enabling you to choose the one that best suits your needs, whether it is for ease, production, quality , or simply because you want to innovate or try new cultivation techniques.

Healthy plants

Cannabis and substrates

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Quick guide to assemble your cannabis grow tent

How to get your cannabis grow tent ready to grow:

In this post we’ll tell you how to properly assemble and install all the necessary devices in your grow tent to start your indoor grow. This step-by-step guide basically explains how to install your air extraction fan and activated carbon filter, how to mount your grow light and how to program your timers. Let’s get started then!

Indoor grow tent

Indoor grow tent

First thing to do is assembling the grow tent by following the manufacturer instructions. Then, connect the activated carbon filter to the extractor fan with some duct tape. Once it is properly sealed (you can also use metal duct clips) you can make the necessary electrical connections (two wires).

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Tips to avoid stretching cannabis plants

What is the stretch?

Stretching at the onset of flower

This cannabis plant is just beginning to stretch

Stretching is what we canna-cultivators call the natural vertical growth spurt put on by cannabis plants during the early stages of flowering, and more notable in Sativa varieties and Sativa/Indica hybrids. Most varieties that display this characteristic will finish stretching by the third or fourth week of 12/12 photoperiod and start to fill out the bud sites, while some strains can continue stretching for a considerably longer time.

Stretching is largely looked upon as something to be avoided at all costs when growing cannabis. This is due to the multitude of problems that can be caused by a grow room full of tall and spindly plants, reducing production as plants outgrow the cultivation area and reach up into the lights, shading lower bud sites and causing weak, airy bud growth. In other words, spoiling all our carefully laid plans for keeping an even canopy throughout the flowering period and definitely not maximising the efficiency of our grow space or lamps. Continue reading

Rooting clones with Green House Feeding Bio Enhancer

As some of you may know, we’ve recently added the new Green House Feeding Bio range of nutrients for plants to our catalogue, which is composed of three excellent products. On the one hand, we have two completely organic base nutrients in powder form, one for the growth phase (Powder Feeding BioGrow) and another one for the bloom stage (Powder Feeding BioBloom). On the other hand, we have a highly efficient root stimulator called Additive Feeding Enhancer, which we’ll test in this article.

GH Feeding Enhancer is a complete mix of humic acid (75%), fulvic acid (3%), seaweed extract (10%, Ascophyllum nodosum), Trichoderma harzianum (10%), Bacillus subtilis, alginic acid, manitol, fucoidan and several amino acids (alanine, aspartic acid, glutamic acid, glycine, isoleucine, leucine, lysine, methionine, phenylamine, proline, tyrosine, valine and tryptophan). This complex provides the root system of your plants with all the necessary elements for explosive growth, plus extra protection against several phytopathogens that may harm the root ball. Furthermore, it also enhances nutrient uptake while stimulaitng microbial life, improving the vitality and resistance of plants against adverse conditions.

Green House Feeding Bio

Green House Feeding Bio

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How to grow cannabis plants in clay pebbles

Growing with clay pebbles

Expanded clay pebbles are a widely used growing medium in the world of hydroponic cultivation. It’s a lightweight, roughly spherical, red ceramic aggregate with a high iron content. Before it can be used, it must undergo several different processes during manufacture. The most important of these steps is heating at extremely high temperatures, causing the rapid expansion of the clay and trapping air in pores within the odd-shaped balls. Clay pebbles have many uses besides hydroponic growing, also being widely used in construction as lightweight aggregate and thermal insulation, etc.

The size of clay pebbles can vary from 5 mm for the smallest to 15mm for the very largest kind. It must be noted that bigger clay pebbles will retain moisture  more easily and for a longer time than those of smaller size.
In this post we will focus on explaining how to properly employ clay pebbles in cannabis cultivation and avoid any potential problems using this hydroponic culture medium.

Buds grown in clay pebbles

Buds grown in clay pebbles

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How to grow cannabis plants in coco coir

Coco coir as substrate for plants

In this post we’ll explain how to properly use coco coir as a substrate for our cannabis plants. After years of experience with this growing medium, we believe that coco coir is the easiest choice among hydroponic substrates.

To get the most out of it, first of all we should take a closer look at its composition and properties.

Coco fibres for hydroponics

Coco coir for hydroponic cultivation

Coco coir is an organic product that comes from the fruits of coconut trees. After processing the coconuts, the remaining fibres of the husk or mesocarp are collected as waste material. These residual fibers are in the form of powder and filaments, and the mixture of both is an ideal substrate for ornamental plants or intensive hydroponic cultivation.

If we take into account the advantages of coco coir when compared to soil, we’ll soon understand why so many growers are considering growing their plants in coco. It’s important to highlight the differences between coco coir and other substrates to understand the great results obtained with this growing medium.
Firstly, it should be stressed that coco coir is an inert substrate. This means that it doesn’t contain nutrients, so we must fertilise whenever we water the plants.

The aeration capacity of coco coir is one of this substrate’s strong points. It’s an extremely soft growing medium, which enables the root system of the plants to develop much faster than in soil. A stronger root ball means more vigorous growth, which allows a reduction in the vegetative period. Also worth mentioning is that coco coir contains natural Trichoderma, beneficial fungi which enhances the development of roots and improves the plant’s immune system, creating a colony of microbial life that greatly enhances the metabolic processes of the plant.
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