A way of making your indoor plants as decorations is really beautiful :) I don't like the wood-look though. I think airplants are the only ones which will work. Other plants require water drainage etc.
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.