Features chicken wire on top to create a rustic and functional flower frog. 3" diameter lid will fit any standard mason jar. Jar is not included. Barn Roof Finish. Each. Green Tip: Indoor plants add atmosphere and also help to clean the air. One easy plant to grow indoors is the philodendron. Use our Mason jar flower frog to propagate new Philodendrons. Put a few cuttings in the jar with some water and let the plants root.