Alright, so you can see that Rockwool cubes provide cannabis growers with loads of benefits. From the aeration of plants to pathogen prevention, you will be amazed at all Rockwool can do for you. To enjoy the benefits of Rockwool cubes, start with a compost pile.  You will create your supply of soil and keep the used cubes away from the landfill site, which is a win-win for the environment and your cannabis plant.