It would be unusual for anything much to happen to the DNA on cloning.
Successive generations of clones may exhibit variation of phenotype.
Loss of vigor might be expected in the long run.
Both of the above are not results of variations in DNA but in environment and age.
So you may get some variation if you take nine clones but the DNA is still very likely the same in all nine plants.
There are mutations but these are rare and often harmful.
Not trying to knock your project or put you off, not many times I see plants looking as perky in tubs as those
.