I have a bradford pear tree too close to the house. I want to kill it and cut it down. I drilled a 1/2" hole about 3" deep at a fork, and have been pouring Roundup in the hole from time to time all winter. It sucks into the tree overnight, but it appears it's going to bud out. Any way I can speed this up? If it just "dies", the better half can't complain about getting rid of it.