I loved these upside-down planters by Boskke. The Sky Planter encourages abundant greenery at home and at work, without sacrificing floor space. Its unique watering system gradually feeds water to the plant, making it ideal for indoor gardening. And in case you were wondering (like I was) how the soil doesn't fall out of the planter and get all over the floor:
A locking disc and mesh holds the upside down plant and soil in place allowing you to hang your Sky Planter. Its internal reservoir system feeds water gradually to the plant roots. This conserves water, saves you time and brings a new angle on the term 'urban gardening'.