LG, yes, I saw the table.
ElPolloDiablo, exactly, roots matter a lot. For peony farms, they use very small roots (at least what I saw and what was told at a conference I once attended), they need some time to grow feeding roots and save enough energy for bloom production. If we buy excellent quality large roots we don't need 3 years to wait, and we usually don't need to maximize bloom production in years to come. Of course we can choose one way or another. In Russia it is customary to disbud peony buds the first year.
