What is mapito ?
Mapito is a growing substrate used by Dutch growers on indoor crops due to its features, like excellent oxygenation or moisture retention . It’s composed of rock wool and polyethylene flakes.
Before using mapito we must stabilise and wet it correctly. The method is quite easy and similar to rock wool slabs. On first place we must clean the substrate to leave it free of impurities or salts which can increase the EC levels. To clean it properly, we should place all the substrate to use in a bucket full of water, and with an EC level as low as possible, from 0.3 to 0.4.
Once we have washed the mapito we must stabilise and set its PH at a range of 5.5, so we start the culture with an EC level as low as possible and a stable PH, for a correct feeding of the plants from the beginning.
Mapito is a substrate that, must be wetted before its use to get an optimal results, since if it isn’t well moistened its capacity to retain moisture will be seriously reduced. It’s important to keep it wet during 24 h, seizing this period to stabilize the PH level.
Advantages of mapito compared with rock wool
Mapito and rock wool are two similar substrates with similar features and excellent results for growing of marijuana on hydroponic systems.
3.5L Plant pot filled with mapito
As we mentioned before, mapito is made of rock wool and polyethylene, and sold in form of unpacked flakes and shavings. This form of flakes is ideal since it can be used in plant pots, allowing to move the plants if needed. With rock wool slabs , plants can’t be moved since it exists the possibility to break the roots or the main rootball and so damaging the plants.
There is, on the other side, the grade of oxygenation, which is high on both substrates, but we should highlight that mapito – as being granulated – has an extra degree of oxygenation compared to rock wool. The high levels of porosity of mapito make this growing media to be really suitable for growing in hydroponic systems and plant pots.
The moisture retention on both substrates is similar, but with mapito we gain more oxygenation and moisture retention compared with the classic rock wool slabs.
At the moment of placing it inside the plants pots it’s important not pressing it too much, because if this happens, the root development of our seedlings will be disfavoured.