Great Thanks for your two answers. First, Fran, It's really cute to offer to help me in english, happily I read better english that I write but be sure that I'll tell you if I am a problem of translating. Scottfsmith, you are right , quince tree is suceptible to the firelight but if I suppose that it's really a 'fungic' problem, I don't think that it would be the fireblight, because it would be worse...My quince tree don't look very ill, just a ponctual problem at once. Of course, I must keep a close eye on situation, but my quince seems in good form although, I will add somme photos of the whole tree. Have a good day!

It's an old argument, between those that don't see the point of bringing up old threads and those who don't have a problem with it. I am in the camp of not having a problem with it. Also I'd like to point out, that Houzz often places links to these old threads next to current threads and people click on them without realizing how old they are. That being said, I have to agree with GGal on the subject of natives. I was an organic garden 40 years ago, when few people knew what organic gardening was all about. Protecting, supporting and nurturing the ecology of your little garden corner of the world. And going along those lines, I also became very interested in growing native and started to buy a lot of them. 20 years Later, I still have many natives in my garden that have performed well, but I also have replaced or lost many others. Including two types of native trees that were expensive to lose. So my own personal experience supports each point that GGal made. It must be exciting to discover all the benefits that native plantings have in the wild and quite a project to devote yourself to replace everything in your garden with all natives. I would find it interesting to follow along with your progress and see how it all works out, so I hope you share your experiences in the forums. But… these statements that you made, provoke conflict. “…there is way better beneficial native shrubs that will offer pollen, nectar, sometimes fruits or seeds and can be a host plant for moths and butterflies which will feed baby birds.” Implying that non-native plants do not? “I could suggest some species but I need your state, it’s always better to plant for your region.” “Our pollinators and wildlife needs us, better add beneficial plants.” You sound like you are ready to set up your own seminar on natives right here in the forums and you are all ready to help us uninformed gardeners to get on board. Evidently you believe that you are doing the right thing for pollinators and wildlife and if we are not doing what you are doing then we are not. To say that ‘natives will ALWAYS be more beneficial in general’ That statement has been proven to be untrue by a number of people in these forum including myself. That’s a fact, not an opinion. We all want to support pollinators, but a native plant that won’t grow in your garden, does nothing for anyone. And there are many non native plants that provide what pollinators need. I’m always interested to hear about a new plant that someone is in love with and why. So any time you want to share how happy a plant is making you….do that. If you would just leave out the rest, it would be appreciated.

First let's make it clear, I'm making the assumption that we're talking about the fruiting quince tree (Cydonia Oblonga) not flowering quince. I don't know where exactly you are, but I'm in Peoria, AZ and I got a quince tree last year. Planted it in february (it was in a 15 gal pot all winter) and it flowered and fruited in the spring. I have made the mistake of not painting it or protecting it from the sun because it didn't have a lot of leaves to start with and it ended up with a really bad sunburn last summer. I should have also picked off the fruit to let it get established first. I went to the citrus clinic last year and spoke to the fruit tree specialist (I think his name was Michael Terry, though I might have the last name wrong). He said that quince do great here even in full sun. Obviously they need protection until they're established. The variety I have is called smyrna, and I can attest to the fact that they don't need that many chill hrs. My tree is on the south west side of my house so it doesn't get as many chill hrs as the trees on the north side of my house, but it still had no problem fruiting. Also the books say less than 300 chill hrs. My tree seemed to have a disease from the beginning, in fact I saw the same problem on that variety at the nursery, but I will prune off the damaged part and leave it for another year or more to give it a chance, but even if this one doesn't take of, I will get another tree and try again, because I love quince and the flowers are just beautiful. They look just like roses right before opening. Not to mention that the fragrance of the ripe fruits is out of this world.

The other problem with this tree is a rather large vertical crack starting from the ground and going right up. It's a frost crack - has been there for at least 2 years that I've noticed. From what I read, frost cracks on ash trees don't necessarily kill a tree but do give bugs an opportunity to crawl in there. After Rick's suggestion that it might be another borer, which I hadn't considered, I read about the Redheaded Ash Borer and the Banded Ash Clearwing Borer, native pests that attack ash trees. I'm quite certain there's something buggish in that tree, based on the woodpecker activity which is almost constant. I'm also thinking this tree is a goner - perhaps not from EAB but something else, slowly but surely. I'll still check it closely - I got some plants from southern Ontario a couple of years - is it possible for EAB to have travelled that way? Those plants are now planted right near that ash tree but that's got to be a stretch, no? Having to remove the tree will affect some plants that now benefit from the midday shade it provides (but they can be easily moved). Having to remove it will mean less ash seeds. Having to remove it give me the opportunity to plant something new there, and that's okay with me.