A small space does not have to stop you from making sure you give vent to your love for plants. There are plenty of hacks to make sure you get plants in and around your house, no matter how tiny it is.
This is an easy pattern. Circles are easy to crochet in general in simple dc, sc, etc.: just keep increasing groupings one more stitch farther apart for each and every new row and the circle should lay flat even if you keep going like that for forever.