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Usually sunburn is a winter problem and is on old leaves. If the sunburn is on new leaves, then it may be a nutrient problem. Wind and cold damage is indicated when the edges of the leaves become distorted and turn brown. This occurs frequently in plants that may be in a colder climate than recommended or in a location with severe exposure. Provide protection from winter winds and winter sun. Note, boron poisoning or fertilizer burn will create the same symptoms except uniformly over the plant rather than just on areas exposed to the sun and wind. Large leaved rhododendrons are susceptible to sunscald if the plants do not receive enough moisture before the soil freezes. The leaves curl in cold winter weather, exposing the central part of the leaf but not the edges, resulting in the area near the main vein becomes desiccated and turns brown. To prevent this, water plants thoroughly before the first hard frost, protect from drying winds, apply mulch, and locate in partial shade. Yellowing of leaves surfaces, often with brownish burned areas, occurring on leaves that are more exposed to sun, is caused by more sun exposure than the plant is able to tolerate. Some varieties need shade, while all plants that have been protected from direct sun will be tender until hardened off by gradual exposure to sun light. Possible solutions are to give the plant more shade or move it to a more protected site. Uniformly yellowish-green leaves is often just the need for more nitrogen. This will be more noticeable in the full sun. Some less sun tolerant varieties will always be light green in full sun. Here is a link that might be useful: How to grow rhododendrons.

Well this was at my sisters she has almost 3 acres that are surrounded by farmland. In the far back corner are a group of trees so who knows maybe this little guy ventured from that area. I have never been back in there to find out if a paw paw was mixed in that group but it would make sense. As far as me growing a paw paw well I did start some seeds this winter and I have one that has germinated. I am even more excited now about that. Since I rent I am going to plant it at my parents but it sounds like I may need to plant it at my sisters now. Hopefully by fall she will know more of what is going on with her husbands job and whether or not they are moving if she stays she is going to get her a paw paw tree regardless if she likes it or not, ha ha. Bev I may be totally incorrect here but I did read somewhere that was talking about letting the paw paw fruit fall to the ground and turn brown before harvesting or eating it. So maybe it wouldn't be so bad as you think. I also heard the flavor is close to that of a banana but creamier. Bad thing is that not all people can eat the fruit of a paw paw there are some that get really sick and sometimes it might not be on the first time they try the fruit. I forget if it was the amount they ate or just sampling it. I love bananas and my great grandmother that was full blooded cherokee use to grow paw paw trees and my father said she was fit as a fiddle. I am sure it wasn't just the paw paw, but I do figure she is where I get my desire for native fruits.

evonne, now we're back to where we were before. And your link is very specific about papaver rhoeas, what I read in two different sources pertained to field poppies but assumed it would apply to mine as well, same as what you're saying. But stage found differently. Maybe sometimes they do self pollinate. I doubt we can resolve the discrepancy unless I just try it and see what happens. Not good to keep crossing them to the same genotype though which I would have to do to keep these going if it even succeeds. Today I went out, and two are blooming simultaneously. So it isn't clear if it applies to a single bloom or all blooms on the same plant. Do you think because of the two going now (and hopefully for the rest of the buds), they will swap pollen? No, I read it again, and it says same plant or another plant of the same genotype. My you've got your terminology down better than I do. I wonder what they do to select what I would call a sport but may not be the right term for poppies. At some point in the evolution of any plant with self-incompatibiity, it must have worked or we wouldn't have so many poppies that come true from seed. It appears many don't as they are sold as mixtures such as Angels Choir. In the above photo from WA state, they must cross pollinate, self sow, and produce uniform flowers the following year or they're perennials. This is all new to me, in the dim recesses of my memory, I knew that corn self pollinates, but the link covers that, too. Some plants don't have the inhibiting factor. Others do in certain families. Must be a reason for it going one way for some and the other way for other types, suppose the experts can only speculate about that. I'm guessing for our now infamous Cherry Brandy Rudbeckia, they must have gotten a new bloom and used seeds from that for multiple generations. Where it is now, it reverts to all sorts of things. I wonder how they do select out poppies then or if they can. What about that unique grape poppy? I think it might be a rhoeas, too, but am not sure.