United Kingdom 
What causes magnjolia leaves to get black spots on and shrivel
27 Jun, 2010
Previous question
United Kingdom
What causes magnjolia leaves to get black spots on and shrivel
27 Jun, 2010
Previous question
If its Magnolia grandiflora, they are prone to bacterial Leaf Spot - if it is that, not much you can do except not to water overhead - water from the base. This form of leaf spot is spread by water droplets. However, without a photograph, it's hard to be sure.
28 Jun, 2010