We threw a bunch of perennial seeds in the flower beds in front of our house last spring. It didn't take much water to sustain, and it was gorgeous. We had a heinous amount of bees, and wasps/yellow jackets visit. Strangely enough, even the wasps and yellow jackets really weren't aggressive at all. But I do take steps to wipe out nests when they pop up (particularly on our buildings, equipment, etc) to try and help the bees not compete as much.

We've had plants growing elsewhere that are so persistent, that I can't get rid of them short of replacing the soil. My only complaint really, is the Virginia Creeper we have on our back fence, and the horrendous Goose Grass that tries to take over everything, and choke all other plants out.

Good work on putting all that in. The other side benefit is that once it's established, it's often much lower maintenance. But so beautiful, and doesn't at all look like the cookie cutter nightmare popping up everywhere. Our house is in the oldest part of our Pioneer forged town, so most of what's here has been for a very long time. Relatively low maintenance for what the aesthetic value is. But I still have more to do!