If you want to break up sidewalks I highly recommend Giant Japanese Knotweed
in the polygonum family. It also makes great flutes, panpipes, & stirfry.
mIEKAL
Unfortunately, I can't recommend this plant for anything. It would be
easier just to sledgehammer the concrete than deal with this monster
once it gets established. It is extremely invasive and costs many state
huge amounts of money in eradication projects. It totally overtakes
native vegetation, creates fire hazards when it dies back, and is
obliterating native riparian vegetation along huge expanses of the
nation's waterways due to the fact that it creates deep root systems
that fragment easily and can sprout from root (and shoot) segements. It
has been shown to be very resistant to eradication even after large
scale spraying. Unfortunately, it looks pretty and a lot of folks grow
it as an ornamental. Also, please keep in mind that we are not
talking about an invasive plant due to the ability to move into impaired
lands with little competition, this is a plant that has moved into well
established communities and wreaked havoc. I encourage killing this
plant as much as possible.