I know peeps who clone up to 8 generations from the same strain. Even if you get the same seed from the same place the plant still WILL be a little different. Once you find the right plant I say keep the mother for 6 months to a year and then clone off and make another mother then another. Thats the only way to keep the same genetics. Now Im not sayn the plant wont be real close, im just sayin the best growers I know buy a good amount of seeds, then take one close from each plant and take the clone all the way through flower and smoke then keep the ones they think are the best as mothers.