Time and time again we find mold developing from gardens being designed poorly, leading to water draining towards the house, where stucco helps development of mold.
Relocate compost. A compost pile is a great idea but can also be a breeding group for mold. Keep it as far away from your house as possible.
Use a good landscaper that knows these pitfalls, avoids them and gives you an incredible design, service and result. One Los Angeles company we’ve found understanding of mold is this: http://larsonslandscaping.com/index.html.