Unwanted trees and woody plants take a bit more to kill than just a spraying of glyphosate products.  They have a hard bark to absorb the chemical. There are many products that you can spray to kill these unwanted plants.  

 

To get a good kill, first you need to get a spot on the bush or tree to have an open place on the bark. You can use a hatchet or machete to make the cut. It does not have to be a large spot, just big enough for the chemical to get to the softer part of the bark. If you are doing a fence row, this is not economical.Some of the products available are to be used without mixing with water. They come in ready to use containers that do not go very far. These products are also available in concentrate. You mix with water or diesel to spray the plants with.  

 

One chemical that is good to use is triclopyr. Triclopyr can be purchased in several strengths. I recommend the 61.6% product. It is very strong and will be more likely to get the job done. Other chemicals are 24D contained material.  The triclopyr is a newer developed chemical and is more likely to work. As with anything else that you would need to wear gloves and protective clothing when applying. 

 

Another product to use is Martin’s stump killer. You make the cut in the tree or stump and spray this directly on the cut. It contains Picloram. There is also a Hi-Yield product that you use especially for stump removal. Drill a few holes in the center of the stump approximately 10-12 inches deep. Drill an additional 1″ hole into the side of the stump approximately 3″ below the top of the stump. This second hole should be slanted to connect (or nearly so) with the bottom of the center hole. Pour 4 oz into each hole. It works best when the weather is warm and stumps are dry. Fill each hole with with water and allow it to stand for four to six weeks. If stumps are to be burned, refill holes with diesel. Allow sufficient time for the liquid to be completely absorbed into the stump.

 

As you can see, there are many options for killing the unwanted hardwoods and leftover stumps.  Spring and summer are the best times to use these products.