Prune a shrub to grow as a tree?
My front yard needs some fixing. There's an area of my front yard that used to house a 10 foot tall tree. Of what variety, I'm not sure. We actually had to remove the tree because the roots were regularly interfering with our mainline plumbing. The roots had basically grown into the plumbing pipe.
Now that the spot is just dirt, would it be possible for me to plant a tall growing shrub and prune it to grow as a tree? My understanding is shrubs have root systems that wouldn't interfere with the plumbing system.
I live in So Cal, sunset 20. The planting spot is about 5 feet from the edge of the front door walkway and about 15 feet from the nearest part of the roof.
I was hoping to find something attractive for year around bright color. Pink would be ideal if possible.