I have always used clones from each gen. Ive seen mutations and its like 1 out of 50 out of 15 gens. In fact I was interested in what would be different if we flowered this mutated clone, and in the end we just got less than the others, the plant seemed almost retarded. but oh well, I guess I was hoping for some kind of Incredible Hulk or gamma related mutation and put forth a new kind of herb onto the world. After a while you can spot them out, just kill them, or give them to people