The power of preserved gardens to bolster sustainability and the occupant experience is demonstrable. Preserved gardens are a part of the biophilic design revolution, which not only has aesthetic and energy benefits for a structure, it also positively engages the whole person of the occupant. However, even biophilic elements can fall short if their materials do not support their health claims. To be certain of the quality of a selection, and not to be a victim of greenwashing, understanding third-party certifications that communicate product transparency, sustainable design, and safety is paramount. When addressing IEQ (Indoor Environmental Quality), knowing with certainty what is in each product becomes crucial. Selecting and specifying preserved gardens for a design is the beginning of a process that can improve the comfort, health, and safety of occupants, and the interaction of building systems. The most successful preserved gardens should also adhere to the highest visual standards. Learning visual quality assessment techniques equips the designer to assess the quality of materials and verify quality control and asset maintenance in installed gardens. This course offers a thorough introduction to preserved gardens and their quality assessment as well as an analysis of the programs, organizations, and certifications that can assist in determining the right materials for the building, occupants, and activities.