This brainstorm started with a discussion of hanging gardens, vertical gardens, and urban gardens, and we primed it with the phrase “gardens where you don’t expect them.” The final product we polished up was Egg Sprouts, but here are the other good or funny ones that cropped up along the way:

• Living spice rack – a rack of plants that can be harvested for spices or seasonings
• Mobile spice rack – a rotating overhead mobile of spices
• Trash garden – a trashcan with plants growing on top that draws nutrients and warmth from the compost within
• Wearable garden – a belt that supports small berry plants for snacking and can be placed on a nutrient station when not worn
• Cartop garden – a thin tray on the automobile’s roof (or attached in the sunroof) that can grow moss, etc. that helps keep the auto interior cool in parking lots and offsets CO₂ slightly
• Office dividers made of bamboo or other hardy plants
• Earings that respond to and visually identify air quality
• Roof-island gardens – roof-top gardens that incorporate water features (for rainwater catchment and filtration or grey-water filtration, perhaps)
• Floating garden islands in rivers such as the Charles in Boston for water filtration
• Window stills – algae entrapped in windows which provides ethanol
• Plant blender for offices – when a decorative plant dies, its pot can be used to grind it up into compost, which of course serves as the foundation for the next office plant
• Send seed cards to other people to plant, and then keep track online of the amount of carbon each garden manages to trap

Then we got into ideas that were less product than novel uses for plants:

• Bromeliads on street signs for air quality control
• Gardens around edges of skylights to filter light – possibly with plants that move in response to water so that they would provide shade on sunny days and curl up to let more light in on rainy days
• Planting grass on ceilings in delightful patterns
• Artful distribution of climbing plants of buildings such that contemplation of the building structure presents itself differently in different seasons

If you’re from MIT, you might appreciate the following two silly ideas: we’d like to see someone moss-graffiti either Building 66 or 34 (then it would really be the Green Building), or turn Transparent Horizons into a hanging garden.