I also really quince as a rootstock as long as you are using known compatible varieties. I have significant FB pressure here in Texas and also tons of host plants and I haven’t noticed any difference in FB strikes at all vs. Calleryana rootstock. In fact I really think the reduction in vigor helps combat FB. All that being said have you checked Willamette Valley nursery? They used to have 333.
Drew
Drew, is there a listing of compatible cultivars with quince? I’m going to be grafting an unknown cultivar, so that might pose a problem in this particular circumstance.
What quince are you using?
I had an D’Anjou on Province Quince. It had a strange issue where the leaves started turning yellow at the end of August every year. It looked like iron chlorosis. I tried treating as such, but nothing worked. The leaves eventually dropped early and then the tree would grow back healthy leaves the next spring. It did this for a few seasons before the first winter below -10ºF killed it (I didn’t know they aren’t cold hardy enough for 5A). It solved the problem, but not the mystery. I’ve never had iron chlorosis issues with anything before, so I’m not sure it that was actually the issue. If it was, it must have been some compatibility issue with my soil and climate. I don’t think there is a compatibility issue with D’Anjou and Quince? 
Patty I’m pretty sure the germplasm repository in Corvallis keeps a quice compatible list on there website. Do you grow Abate Fetel or Magness? Both are known to be very quince compatible and yu could use them as an interstem for your unknown variety.
Drew
How tall is your tallest? Just wondering what to expect since I have a 97.
I do have both, Drew. Just got my Abate Fetal a few days ago, and it’s going in the ground tomorrow, in fact (it’s on OHxF 333). Magness was planted last year, and it’s on OHxF 87. So, I could use them if I needed to, thanks, didn’t even think of that. And thank you, Clark, I’ve saved the links. Very helpful. Susu, my Pineapple is probably 12’, and getting pruned back down after fruiting. My pears don’t get overly tall, overly fast out here. Nothing like my stone fruits do. Even some of my apples will send out some pretty tall branches. But, my pears are much better behaved, even my Pineapple, which is my biggest pear tree.
Be forewarned that Magness is pollen sterile. Awesome pears, but it’ll need a pollinator.
JG
Cidery, I have about 20 different pear cultivars in this general area. Lots of pollinator options for Magness 
Yeah mine is right next to Hosui Asian pear which seems to be a good pollinator for this thing. It has set fruit a few times for me now. Biggest problem I’ve had is the almost total lack of chill latley in Dallas. It has said few nice blooming clusters but nothing like it had a few years ago when we had more chill.
Patty,
I may go to https://skipleyfarm.com/ this week and will ask them if I do.It looks like they have OHxF 97. Brady
Thanks Brady. I think I’ve located some OHxF 333, but good to know if there is a back up, just in case.
Howdy, I live in the Willamette Valley and I don’t see anything with that name on an interweb search. Can you post a link?
Ooppss…when I added quince root-stock to the search, the top listing was: www.willamettenurseries.com/ …with this warning.
This site may be hacked.
Their description does say rootstocks, but now I’m skeered to click-it.
Probably this place…
http://www.willamettenurseries.com
I have gotten nice rootstock from them in the past.
PS I’m not getting any warning…
There wouldn’t be a warning on their page, but it shows up on my search results. Seems that my browser has been extra protective lately. Even logging in to this site it now says that there is a security issue…eeekkk…I’ve been doing it anyway, obviously…
I have a system like that which is not warning me on their site, thats what I meant. But it does looks like Google is reporting it may be hacked. Not this forum though.
Heard Quince rootstock favored acid conditions. That may be why we don’t see it much out west.
Harvest Queen on Quince is looking perky since I started treating it with sulfiric acidified water.
I think that is over blown. It may like acid better but I have used it in two different settings with quite alkaline conditions and it worked fine. I too have bought stocks from Willamette and they were nice.
Sorry about reviving such an old thread, but I wonder about your experience with P. Calleryana. . .
I have understood Bradford Pears, P. Calleryana to be resistant to fireblight. Purdue’s extension service summary.
includes P.Calleryana under resistant rootstocks.
Then I see this:
and wonder if it is a new phenomenon?
Wild Callery in my experience here in Kansas are mostly fireblight proof. That is not to say they all are because they are not. New non wild callery are sometimes planted and some have no resistance. Wild callery is simply a matter of survival of the fittest and after several generations of living or not they are completely resistant. I will add this link Callery pear as rootstock? help with this. Williamette Nursery callery are very resistant and I grow them now. In 2016 in the above linked thread I said " jujubemulberry ,
I think that’s a very good point you brought up and I’m glad you did. Your right that a true Bradford pear are very short lived. No one really knows how long callery rootstock like my oldest will live. These are some of the cultivated variants of callery listed below. Bradford typically are lost to storms but not all of the other ornamental pears have that flaw. The wild callery are durable and I actually have friends with some on their property that are very old. A nearby town a tree stands that a friend dug seedlings from 30 years ago and the tree is still there. What is it? I don’t know for sure but I suspect its a hybrid. The urbanforestnursery made these observations about callery varieties they posted to their website
" 'Aristocrat’ A wider form tree with branches at right angles to the central leader. The distinct characteristics of the leaf are its wavy edges. Fall color is not as reliable as others, but if you have the crown space, the Aristocrat is a fine selection. Older trees are reported to reach 40’ high by 25’ wide.
‘Autumn Blaze’ This tree is not recommended unless the site is very protected from wind. Although the form is round and the color is better than most of the pears, the limbs are incredibly brittle. Even if you get trees to the site undamaged during handling and shipping, winds will tear the tree apart for many years. From my experience, this one should be listed along with the original Bradford Pear.
Cleveland Select Flowering Pear’Chanticleer’ (same as ‘Select’, ‘Cleveland Select’, and ‘Stone Hill’). The most popular, as well it should be, with its upright pyramidal growth, relatively good branch structure, and consistent qualities listed above. This cultivar was reported to reach 35’ high by 16’ wide after 15 years.
‘Cambridge’ Appears to have cleaner, more regular ascending limbs, smooth bark, with orange fall color. It is narrow like "Chanticleer’.
‘Capital’ Even narrower than the ‘Chanticleer’, so for a narrow space, this is the better choice. I have found the branch structure not to be as consistent or attractive in its winter show. The tree is said to grow to 32’ high by 8’ wide in 15 years.
‘Jack’ This tree is the smallest pear cultivar I have seen, growing to no more than 15’ tall by 10’ wide. This tree has a dense branch structure and very slow growth. Call for it more as spaces for trees get shorter and tighter. Check out the Jack Pear tree profile here.
‘Redspire’ This tree has a moderately pyramidal form, less than Chanticleer. I have found it to have some brittleness, thus somewhat susceptible to wind breakage.
'Bradfords’ are known for their extremely tight crotches and severe splitting apart as they mature. This cultivar was the first selection of Pyrus calleryana. Most of the older Bradfords have literally split apart. Avoid this one along with the ‘Autumn Blaze’ " as found here http://www.urbanforestnursery.com/treeprofiles/profileflowerpear.html
In Kansas I frequently go observe wild callery and other types of pears. A friend mentioned a location with wild pears on his property and asked me to hike out there and determine what they were. The pears were as expected callery pears but that was when the surprises started. Typically the species has pea sized fruit. These trees for the most part were typical callery pears except for one tree which is shown in this photo.
As mentioned the above tree is no Bradford nor is it short lived. It’s been there around 25 years they knew of. They bought the property then to deer hunt and the deer eat this fruit. Here is another wild pear with more typical fruit as a comparison below.
Oddly I found non producing and producing pears in this area well over 100 years old."