Different types of algae  There are different types of algae that can affect cannabis plants, and knowing how to deal with algae will go a long way in ensuring that the plants grow well. An Alga causes stunted growth in cannabis plants because they cause the plants to be deprived of oxygen when they attach to the root system of the host plant. In addition to creating a shortage of oxygen, the algae also compete for nutrients with the plant. What are some of the ways in which a ...