• Composting (and reusing on site) nearly 100 percent of the Garden's plant waste
• Washing and reusing plastic and clay pots
• Utilizing some propane-powered mowers
• Using only manure-based fertilizers for turf care, alternatives to spraying in the rose gardens, and only composted and organic-based liquid fertilizers for outdoor plantings
• Implementing a biological pest control program in the greenhouses
• Installing rain sensors on irrigation systems
• Installing LED grow lights in the propagation greenhouse, saving 60 percent of the energy required by traditional grow lights
• Promoting and using native and adapted plants in horticulture displays
• Providing sustainable gardening educational displays and resources for homeowners and the nursery industry
• Operating the most extensive public garden recycling program in the nation: the Plastic Pot Recycling program, which collected a record 138,000 pounds of horticultural waste in 2010. To date, the program has saved over 980,000 pounds of plastic garden pots, cell packs and trays from landfills.

Energy Efficiency:

• In 1996, the Missouri Botanical Garden's Board of Trustees established an energy policy resolution confirming energy efficiency in its facilities to be a major capital and operating priority.
• The Garden has invested in energy efficiency through improvement of lighting technology, upgrade of heating and cooling systems and ongoing maintenance of existing systems.
• From 2000 to 2005, the Garden increased building area by 11 percent while reducing annual energy usage by 22 percent as a result of implementing energy efficiency measures.

• In 2009, solar panels were installed in the Kemper Center for Home Gardening to offset the power demand of the floral clock, a temporary display installed in honor of the Garden's sesquicentennial anniversary.
• In 2010, a 25 KW photovoltaic solar system was installed atop the Commerce Bank Center for Science Education offsetting approximately 5 percent of the building’s electrical needs.

• In 2011, the Garden initiated the Turn it Off Campaign to encourage employees to turn off lights, computers and other equipment when not in use. The goal of the campaign is to reduce the Garden's carbon footprint by 10 percent in one year.

• Single stream recycling is collected throughout the Garden and at all public events.
• Over 90 percent of the construction waste from recent Garden projects was repurposed or recycled, including the Spink Pavilion renovation and the Shaw Nature Reserve Edgar Anderson Center construction.
• Used visitor maps and tickets are collected for reuse and/or recycling.
• All outdated electronics, batteries and lamps are directed to specialized recycling facilities.
• All copy paper is 100 percent post-consumer recycled content.
• All boxed lunch waste is composted.

• All cleaning products are Green Seal certified.
• All janitorial paper products contain post-consumer recycled content.
• Micro-fiber cleaning cloths have replaced disposable rags.
• Motorized cleaning equipment is certified by the Carpet & Rug Institute.

Water Efficiency

Irrigation

• The use of an on-site weather station at the Kemper Center to monitor the Garden’s micro-climate and employ maximally-efficient irrigation schedules
• Installation of maximum efficiency irrigation controllers and heads which use 30 percent less water than traditional heads
• Use of surface and subsurface drip irrigation where it is more efficient than sprinklers

Buildings

• High efficiency plumbing and waterless urinals at the Commerce Bank Center for Science Education: one of the first installations of this device in a St. Louis business
• The Garden performs an economic assessment for the installation of high-efficiency plumbing before any new restroom renovations.
• Cooling towers operate as part of buildings’ upgraded HVAC systems, which are managed for maximum efficiency

Water Conservation

As an exemplary leader in sustainable gardening practices, the Garden is committed to managing its use of chemicals responsibly to avoid polluting our waterways.

• Garden staff limits and tracks the use of fertilizers, herbicides and pesticides as well as the magnesium chloride and sand used to treat ice on parking lots and paths.
• The Garden exclusively uses cleaning products that are Green Seal-certified.
• Cooling towers are managed with minimal amounts of biocide to control algae.

The Garden’s attention to stormwater issues makes it a model for businesses throughout the region.

• At the Ridgway Center, parking lots are engineered with pervious pavement and bioretention areas to retain 50 percent of overall stormwater in a typical St. Louis weather event. Additionally, 50 percent of the stormwater which falls on the Monsanto Center is captured on site.
• The Garden has done extensive research on stormwater BMPs and offers resources and guides for homeowners to install their own rainscaping.