In the field of hydroponics, clay pebbles, also known as arlite, have emerged as versatile and effective substrates for growing plants, particularly cannabis. These lightweight, iron-enriched, dry ceramics have undergone several processing steps before becoming a preferred growing medium. In this article, we will explore in detail the preparation steps for clay pebbles, the different hydroponic growing systems suited to their use, and provide precise guidelines to ensure thriving cannabis plants. How are clay pebbles made? Clay pebbles are produced through a complex process that begins with a lightweight, dry ceramic mixed with iron. This combination undergoes various phases, including firing, during which the iron evaporates, creating pores within the clay pebbles. This permeable texture not only makes them lighter but also better suited to root growth and the circulation of water and nutrients. How to choose the right hydroponic growing system with clay pebbles?Since there are several hydroponic growing options, it’s important to select the system best suited to clay pebbles. Among these processes, two systems stand out: flooding and drip irrigation. Flooding is very well suited to circulating systems, while drip irrigation is ideal for growing in pots or trays.
This harmony between the substrate and the growing system is essential for maximizing results. How to use clay pebbles in hydroponic cannabis cultivation?The different techniques to apply for optimal use of clay pebbles in hydroponic cannabis cultivation are:
Pre-stabilization of clay pebbles;
Hydroponic cultivation;
Drip irrigation with clay pebbles; Optimizing plant nutrition with clay pebbles;Root flushing and care;
Use of hydrogen peroxide;
Pre-stabilization of clay pebbles
Before introducing clay pebbles into the cannabis growing system, it is important to prepare them properly. Since clay pebbles are not sterile and may contain impurities, washing and stabilization are necessary.
Hydroponic cultivation Hydroponic systems are deep trays filled with clay pebbles. These systems allow for precise and uniform irrigation thanks to a vertical tube indicating the fill level.
Drip Irrigation with Clay Pebbles
In drip irrigation systems using clay pebbles, maintaining consistent humidity within the pots is crucial.
This is why strategic placement of the drippers is necessary to ensure uniform distribution.
- Optimizing Plant Nutrition in Clay Pebbles
- Clay pebbles provide excellent root oxygenation and precise nutrient management.
- EC levels are thus moderate, with a limit of 1.2 during the vegetative stage and 1.6 during the flowering stage.
- Root Flushing and Maintenance
- Recirculating hydroponic systems require periodic root flushing. For this purpose, an auxiliary reservoir with a low EC is essential to avoid completely emptying the main reservoir.
Using Hydrogen Peroxide
Hydrogen peroxide (H2CO2) is an effective disinfectant for clay pebbles. It is used to clean the substrate and disinfect the growing environment.
