The U.S. Environmental Protection Agency's (EPA's) GreenScapes program provides cost-efficient and environmentally friendly solutions for landscaping.

What makes a site a “GreenScape”?
The usage of biobased products that are produced from renewable resources
Specifically fertilizers, cleansers, and solvents
Using green products: Database of Green Products at the EPA website
Using recycled content products: CPG website of recycled products
Greenscaping can either be used on a large scale or by home owners.

How to GreenScape
GreenScaping is the performing of reducing, recycling, reusing, and rebuying.

Reducing: Reducing the production of waste is the first and most important step toward efficient material use. When planning a new landscape design or updating a current one, avoid products that require frequent replacement or regular maintenance to reduce future waste.

Reusing: Reuse serves as the second key component to environmentally beneficial landscaping. Reuse of products prolongs the useful life of these materials, thus delaying final disposal or recycling. Many items can be reused effectively without adding much time or energy.

Recycling: Recycling is the segregation, collection, storage, and removal of recyclable or compostable materials from the municipal solid waste stream. Recycling minimizes waste generation by recovering and reprocessing usable products that might otherwise be disposed of (e.g., plastics, green trimmings, and food waste).

Rebuying: Rebuying means re-thinking your purchasing habits. Look for products that meet your needs but have a better environmental profile than your current product purchases. Consider bio-based, recycled content, and other environmentally preferable aspects in your purchasing decisions. Recycled products, for example, are often more durable than those made with virgin materials, saving money and raw materials over time. Rebuying is key to sustaining recycling markets, and it aids in the development of technology that conserves resources and prevents waste. You can work with your managers, clients, suppliers, and vendors to identify and establish specifications to purchase various environmentally preferable products.

Regional Activities
The GreenScape website has a section, found HYPERLINK "http://www.epa.gov/epaoswer/non-hw/green/live.htm" here, that has regional information on their program.
Application the GreenScape Alliance: Forms and Information