Hi, recently had two huge shrubs removed from front garden as roots were cracking the retaining wall. Not a good job cutting the trees down as the stubs are protruding just above the ground. Any suggestions on hedging that will not affect the wall and how long after the stubs were drilled into & I assumed poisoned should I wait before planting. I am in Albany WA. Nothing too costly as we are renting however I don’t mind spending on a little front face lift. Thank you