That may take a while. The article was originally written in 2013 and offers the description of the flowering plants then (which had at the time not yet been named). Those were all plants of which there was only one. Thus suppose they have been divided Fall 2013 and some sent on towards some growers. Then they may or may not have divided again in 2015 and maybe 2017. Suppose three divisions could each time be obtained, then we would now have 27 plants in their first year of growth again (1-3, 3-9, 9-27). This is a best-case-scenario with division every two years (it might also take 3 years), good multiplication rate and in the hypothesis that each and every plant is divided again (thus Hans not keeping any plants for himself or for hybridizing). But as Hans would say: “I believe it is known that tenuifolia clones dont multiply as quickly as some other peonies”, thus arguably the number will be smaller. The first years of a new cultivar is simply building up stock, which in the beginning goes very slow, but once you get to the larger numbers, it can go very quick of course. I believe there’s great market potential for these cultivars as they are unknown to most people, completely different, and they offer both spectacular foliage and flowers, thus season-long interest. The combination of scarce supply and serious demand (in peonies in general, but such rarities in particular) may result in what I would expect to be very high prices initially.

The registered cultivars are being propagated at the following three nurseries: Joshua Scholten (www.peonyshop.com), Wolfgang Giessler (www.giessler-paeonien.de) and Steffen Schulze (www.pfingstrosengaertnerei.de). Hans thinks the first one to offer it will probably be Joshua. Little Erna is already listed on his website as available from the year 2021, which in the ideal situation would mean dividing next year again and in 2021, thus two more propagating cycles. I don’t know from how many divisions he started, but assume he had 1, then he would have some 75 divisions by then, of which most must surely be kept to grow on for further propagation. Yes, new peony cultivars can stay ‘new’ for a very long time when you compare them to other plants…