Heavenly Bamboo (Nandina domestica) is indeed considered both invasive and poisonous. Birds and animals easily spread the numerous red berries it produces resulting in them growing in areas outside your yard. These berries also contain cyanide and can be deadly if consumed in large quantities.

Understanding the Context

The articles linked below provide additional information on this plant and alternative shrubs to grow ... As noted, this is a large plot of established mature bamboo that will require specialized equipment and repeated treatments to bring it under control. You might want to consider hiring a local landscaping company to do some of the work for you. Bamboo is a type of grass so constant mowing with your mower set to its lowest setting will help to keep if from spreading.

Key Insights

If you want to get rid of the mature bamboo that is on your property, you will need to cut it back or dig it up and apply an herbicide, and the timing of the cutting and herbicide application is critical. How to kill bamboo using Glyphosate. I was told you cut off each stalk about 8” to 1’ above ground and then use eye dropper to fill the inside tubular cavity of the cut stalk with Glyphosate. Have you any experience or knowledge of this? Is there a better way to kill bamboo?

Final Thoughts

If so what do you recommend? Here are some suggestions. Eliminating bamboo plants starts with a shovel. The creeping rhizomes and roots of bamboo are virtually immune to the herbicides people normally use on unwanted plants. In order to start to get rid of bamboo, you must physically dig up the offending clump. Make sure you remove as much of the roots as possible.

Your situation is a recommended use for Imazapyr. It does have a soul residual, which makes it more effective but it can affect non-targeted species. This is a situation where you have to weigh the harm of leaving the bamboo to outcompete the native plants va the damage that may occur from the herbicide treatment. I recommend using it to control the bamboo.