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Herbicide application to a cut stump effectively kills mimosa trees, but you must then dig up and remove the obstructive mimosa stump. 1 Look for buttressing around the base of the stump to. Persistence is the key to killing a mimosa stump for good. You may have to apply the bleach, vinegar or salt more than once and it may take several weeks to begin see the effects. With continued.

Sep 21, Apply a systemic herbicide to the cut stump to kill the roots of the tree. It may take several applications of systemic herbicide to completely kill the tree. Continue to cut down suckers from the trunk until the mimosa roots have completely died. Remove any wayward branches, cutting back to the branch’s point of origin. When a mimosa tree is planted as a street tree, remove the lower branches to allow enough room under the crown for cars to pass.

Prune in mid-to late winter before new growth begins. Tips. Mimosa tree is used as a street tree, a shade tree and a specimen bushdig.barted Reading Time: 3 mins.