Hemp cultivation, according to current legislation, is not at all illegal, despite the widespread confusion surrounding it. In Italy, it is legal to grow hemp in compliance with the varieties permitted by European legislation (using the European Seed Registry); that is, for the majority, the THC content must not exceed 0.2%. When we begin growing hemp , however, we must also be reasonably aware of the needs of this plant, like almost all other cultivated plants. For example, we can use pre-prepared soil, depending on our needs, or use our own soil, which we will modify and add to improve its portability and density. In short, if you want to learn more about the best substrates for legal cannabis cultivation , keep reading—you're in the right place!
Types of soil for growing hemp
If we purchase pre-calibrated soil mixes, we can immediately address all the needs of our seedlings. They must grow properly, stay hydrated with the right amount of water absorption, and be nourished with vital nutrients. Cannabis soil specifically tailored to this plant's needs is only available in specialized stores such as grow shops. Now, let's take a look at some of the best cannabis soils and their various properties:
- sandy soil: suitable for perfect drainage, but characterized by poor water retention, they have the advantage of maintaining good doses of oxygenation but rarely provide the right amount of nutrients. Nutrients such as nitrogen, for example, are immediately drained and dispersed in the soil. The pH is usually low.
- muddy ground: it has a drainage that is not optimal, but discrete, and above all properties opposite to the sandy one: in fact, it allows all the nutritional supply of the substances that the plant needs. The soil is easy to work, water passes through it with relative ease and it is one of the most fertile soils.
- silty soil: composed of many organic molecules, but also sand, silt and clay, it is probably the best compromise for all types of climates and plants. In fact, it has excellent drainage, thanks to the sandy component, but it also manages to retain enough water, thanks to the silty and clayey component, guaranteeing every optimal condition. The only flaw is the cost, considerably higher than other soils but still, it is worth it.
How to improve the quality of your soil
If you're working with natural soil you already own and don't want to buy a completely new, fertile soil, we recommend improving its quality by adding soil improvers , substances available at any gardening store that will enrich and fertilize it. These include:
- pearlite, used mainly to improve the quality of drainage (therefore recommended on poorly drained soils such as muddy, silty and impermeable ones). It is composed of light and small diameter rocks, of a bright whitish color. You will have to insert it directly into your soil in a percentage of 10-15% compared to the total soil. If you overdo it, you will see as a result excessive drainage and loss of minerals and nutrients.
- coconut fiber: insoluble fiber, mostly lipidic, it comes directly from coconuts and has excellent water retention properties. It therefore improves the consistency and permeability of sandy or stony soils, which are unable to retain nutrients inserted for the well-being of the plant. In this case, we recommend adding 30% of the original soil.
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