Rock Wool Cube

Regular price R 2.50 Sale

Rock-wool square plug 36mm x 40mm

Rock-wool can hold large quantities of water and air that aids root growth and nutrient uptake in hydroponics; the fibrous nature also provides a good mechanical structure to hold the plant stable. 

Rock-wool is made by melting a combination of rock and sand and then spinning the mixture to make fibers which are formed into different shapes and sizes.It is used primarily for drip hydroponic systems.

Rock-wool Cubes have a pH of roughly 7.8. This is pretty alkaline, yet our plants prefer to grow in a slightly more acidic environment (between 5.5 – 6.5).

In order to prepare our Rock-wool cubes for the seeds, we need to soak them in some pH adjusted water, that way they have everything the seeds need to germinate and sprout.

Please note: A water PH lower than 5 will damage the fibers of the Rock-wool cube

Do not Squeeze them to drain any water:  Rock-wool Cubes are designed to maintain the correct water to air ratio and squeezing them may damage their structure.