A giant for the garden. Petasites japonicus is a spectacular plant that gets a lot of attention in the garden. Unfortunately, it spreads rapidly and is not suitable for all gardens unless you can contain it. I have had success doing this for several years by planting it in a large tree sized, bottomless, plastic pot which you can see in the picture of the flowers. The creeping rhizomes grow almost at soil level and do not get out of the pot.