I have to agree with Orzy. I've got a donor that's a few years old and there is no way it's cuttings have decreased in quality. A different donor about 18 months old is the same way. Sometimes it's just the strain. BigBuddha's Cheese is one of those strains that wacks you as well a year or more later as it does the first time you try it. I haven't tried his bluecheese yet. To me a mother or donor never completes it's life cycle. Since length of darkness determines whether a plant will flower or not I don't believe the plant knows anything but to veg with less than 12 hours dark. There have been debates on this subject for years and it's hard to argue either against the other. IMHO that it should take thousands of generations of clones from clones before there is genetic degradation. Also, there are clone only strains that have been around for 20 to 30 years and still coveted.