Yes your correct pyro2-33 i saw my mistake on the previous post but hadnt had an oppurtunity to correct it yet. They didn’t just die from drought I kept 1 or 2 alive for years with constant watering. They could not grow here. They could not establish enough roots to keep them alive. It was like growing a blueberry in alkaline soil. Same is true of quince weakling rootstocks can’t survive here. That does not mean they are bad for everyone. What’s bad about them for me may make them good in an area that wants a small tree but have deep rich black acid soil and twice the annual rainfall. This is a marginal area for fruit Noone has a pear orchard here besides me. @39thparallel does well in a nearby area with richer soil. His soil is top grade the best Kansas has to offer. We exchange ideas and we know many tricks to keep things alive here. Pyrodwarf is not pyro2-33 but at the time everyone called 2-33 simply pyro rootstock so it was my mistake believing the reference was the same. Many articles make statements like this " Pyro 2-33 trended toward being more dwarfing than OHxF 87, and in some of the trials and years, had equivalent yield efficiency." Yet they gave it glowing reviews Pear Rootstock Research Project | Chelan & Douglas Counties | Washington State University . In a marginal pear growing region which is not what the tests are concerned with that means trouble for us. That’s not to say in the hood river area pyro2-33 is not an ideal choice. Created this thread for reference as we have discussed rootstocks exhaustively many times Pear rootstocks revisited in 2022 . Every few years the next novelty pops up and sometimes there is merit to them. Ohxf333, 87, 97 are all on my farm growing with Harbin, callery, and BET. The Harbin mostly have died over the years due to pear decline I would assume. There are still half a dozen alive and doing fine. All the others mentioned ohxf and callery and BET like it here. BET are aggressive and thorny as if Kansas was made for them. Similarly callery thrive here. Ohxf overall do very well but show their weakness in certain situations with rabbits, droughts and other extreme situations not typically occurring. If callery and BET have a weakness I have not found it. There is much to like about ohxf I see why ohxf87 is so popular. In addition I grow Farmingdale there is actually no Farmingdale in the ohxf cross. There should be it’s a great tree and great rootstock. It’s actually ohxb I’m afraid Old Home x Bartlett? | Good Fruit Grower according to postman. Postman is a pear expert i have great respect for. Natelson did much for pears in the south as he recognized pears unique growing situations. Every article Dr. Natelson read must have said grow Bartlett until he started gathering southern varities. Originally pyro2-33 were referred to as pyrodwarfs class of rootstocks when most people spoke of them as seen in many threads.
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