I have been building and maintaining our family's yards, and turned it from a dead/dying lawn into a lush green-scape. Currently, we use our backyard for both relaxation, as well as some vegetable-growing. Everyone who has seen our garden seems impressed.
I should be able to help you with your established garden, but will need to know the size of your garden, and what you hope to accomplish with it.
Are you hoping to maintain what is already there, or are you planning on making changes? I can help you with both.
Please let me know.
Thanks,
Ryan