Tech companies are increasingly installing greenery, particularly living walls, in offices and retail spaces.

Apple became one of the latest adopters of this trend with two living walls in its redesigned Fifth Avenue store.

These installations are primarily driven by millennials' propensity for plants and wellness.

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Tech companies and VC firms are increasingly incorporating plants into corporate offices and retail spaces.

There are a few reasons why this green design movement is taking off, and they have to do with millennials' preferences as they move up in the workforce, according to Stacy Colman of Plant Wall Design.

Millenials love plants. Amazon now carries live houseplants, and other direct-to-consumer plant start-ups like The Sill, Bloomscape, and Horti, are appearing, offering services like monthly subscriptions and "jungle" kits — plant starter kits sold as a theme, like "pet-friendly" or "hard to kill."

Serene Buckley of Habitat Horticulture, another company that does living wall installations, also noted the positive psychological effects that plants can have on stress and productivity.

Millennial's love of plants and wellness, along with businesses' incentives to make offices and stores comfortable so people stay longer, have made the perfect environment for plant walls to flourish.