This HGTV website has links to articles on composting, organic gardening, green lawns (grass, not weeds), fertilizing, pest control, and mulching (organic and inorganic). Be sure to check out the mulching no-nos and the pros and cons of organic and inorganic mulches. [Have you ever tried to weed a stone bed?]
There's also an article on invasive plants. Pampas grass is invasive in California, btw. (Invasive plants are a big problem in California, Florida, and Hawaii.) It's strange to think that parsley, daylilies, and Japanese maples are invasive in some places.
Link: Home Improvement : 7 Steps to an Organic Landscape : Home & Garden Television