I have a magnolia, saucer shaped blossom, that was here when we moved in 12 years ago. I live in Delta, and for the first time since we moved here, the magnolia leaves look a sickly yellow. It has never done this before. The previous owners had planted it in a boggy area of our yard, and it was too large to move then. I am wondering if it is the location causing the problem, and if there is anything I can do. It had glorius blooms as usual this year. Thank you, Trish