Josh Rosen first became enamored with tillandsias during family vacations to Hawaii. They looked like aliens that had landed and could get up and walk away. That’s because they’re epiphytes. They grow without soil and need good air circulation to thrive. Interest in tillandsias has exploded in recent years because they’re remarkably adaptable to small urban spaces and they are low maintenance – needing air, bright filtered light and a weekly soak in water.