Ginger is a plant used frequently in desserts and Asian cuisine. It can be grown in most gardens, but it can become a problem if the plants aren't regularly cared for. Ginger is known for rapidly reproducing and taking over a garden. When this happens, the only way to take control over them is to kill them. Since ginger has a large root system, it can be difficult to completely kill it off; however, with the proper technique you can kill ginger plants quickly and effectively.
Cut the base of the plants at soil level with gardening shears. Discard the plants in a large trash bag.
Dig up as much of the ginger root as you can with a shovel. Even if you can't dig all of it up, the shovel will likely cut the root and expose the inside which will make it easier to kill. Put the roots in a trash bag.
Apply an herbicide directly to the area with the ginger problem. Depending on the herbicide you use, you may need to dilute it with water, so read the directions on your particular product. If you need to mix it with water, it is easiest to do so in a watering can.
Apply the herbicide again after three days.
Apply 10 layers of wet newspaper over the affected area. Cover the newspaper entirely with mulch. The combination of the two will smother any living plants below and temporarily make it impossible for anything to grow in the area.