Just a bit from this story about hard times in the landscaping business that caught my eye:
Lately [John Catapano, who owns Houston's Western Horticultural Services, has] used more environmentally friendly products to help cut costs.Two years ago, he began converting his 30 vehicles to biodiesel, saving him about 5 percent on his fuel costs. More than three years ago, he began to use organic instead of synthetic fertilizers. And he plants drought-resistant greenery.
"Going green does save money," he said.
Well, it does sort of depend on your definition of "green"
In the context of landscaping, xeroscaping and using native plants definitely saves on water and often on pesticides.
However, going with organic fertilizers often costs a whole lot more, especially in the context of commercial landscaping where you aren't doing your own composting. Organic anything (milk, lettuce, or fertilizer) generally costs more.