Tillandsia pants from Design Within Reach... Known as "air plants", Tilandsia do not require any kind of soil, and only need to be soaked in water once every two or three weeks, which is great news for those of us with less-than-green thumbs. DWR presently sells four varieties, approximately 6-8" high. All produce flowers; according to DWR: "Each varietal has a different aesthetic: Kendra will blush into a red hue if left in a brightly lit area and will bloom with numerous purple flowers. Also reddish with purple flowers, the Eric Knobloch varietal has long, thin leaves that point out in every direction. Iontha Druid grows in a ball, a dense rosette of yellow-green leaves, and it blooms white flowers. A graceful hybrid, Redy turns a red hue in bright light and blooms red flowers (hence the name)."