A good rhizome barrier can be made by trenching a perimeter around where the plant is to be contained and then placing on edge our barrier made from 30" high, 40 mil plastic. Seal the seam with pop-rivets, underground pipe wrap tape or our plastic clamp assembly as shown. Another method is by filling the trench with concrete. If the trenching seems excessive rent a Ditch Witch type trencher to do the job. If the climate is dry in the summer, an effective barrier can be accomplished through drip irrigation and watering only the center of the plant.
Our black plastic rhizome barrier is 30" high and made of 40 and 60 mil polyethylene. Minimum order is 20 feet. Maximum length per box is 200 feet. We can cut any length in between.

Click on the drawings to read an article about installing rhizome barrier in a small area.

Plastic Rhizome Barrier Clamp Assembly
Order one clamp assembly per seam. Ideally, only one seam is necessary. The clamp comes with stainless steel bolts, washers and nuts. Each installation may have different characteristics. Order clamps as needed.