Hi, I live in Greece and planted a Magnolia Stellata 3 years ago. She has bloomed every spring, but then the trouble starts - her new leaves seem to suffer from chlorosis. I have given her Sequestren, but to no avail. THe tips of the leaves are brown, brittle and dry - magnesium deficency? Have fertilized with Complesal Supra - 2% Mg and Miller foliar 20-20-20 as well as with a liquid plant feed for flowering shrubs. Of course not all together, but over the course of this years growing season. The shrub is now almost bare with an abundance of buds. What could be going wrong year after year? Clay soil mulched with humus and peat added last year. Afternoon sun.