Air plants (Tillandsia) are one the the most exotic low-maintenance plants you can keep in your apartment.
Air plants are actually a genus of plants, and there are countless different species you can buy – that come in various shapes and colors.
Generally speaking they hail from tropical climates, which is part of the reason they don’t need to be potted.
In their native environments they live off of rainwater, CO2 and sunlight alone – so as long as you treat them right, they happily sit on your shelf or tabletop and thrive.
Some of them need more water than others – generally I just gather mine up once a week and them all soak together.
Granted, I’ve read that some species require a bit more moisture than that, so when in doubt ask the person you buy your air plants from what they recommend.
They make great apartment plants as they barely take up any space and don’t require a lot of care.
I would recommend them to anyone looking for an addition to their indoor urban garden.