I live in norhtern Utah (US) where we are in zone 4 with hot dry summers. I also have alkaline clay soil. Chlorosis is a real problem for Amur, Trident, David and some of the others. I do have Norway, Rocky Mountain, Big Tooth, Paper bark and 5 palmatums. The palmatums are sheltered close to the house. I am looking at some of the Asian maples as an alternative but I am worried about the chlorosis. Does anyone know if any of the following would do for me in either sun or shade? I think that the first two would be OK but I am only guessing from the limited information that I could find. 1. A. pseudosieboldianum 2. A. caudatum ukurundiense 3. tschonoskii ssp. koreanum 4. mandshuricum 5. sieboldianum 6. tegamentosum I hope that there is someone out ther who can help me but I doubt that any of you in the northwest have seen iron chlorosis. Thanks for any help.