Tried posting this before but it appears to have failed

I got a 2 gallon quickfire for a foundation bed along the side of our home. The bed currently has sweet pea and bellflowers, some wild grass, but it's loose and informal.

Want the quickfire to spread and fill the space in with more drama and to obscure the AC from the road.

Question about the other plants though...should I clear them all out immediately to allow for the quickfire spread, over time or at all? Can the quickfire compete?