Thanks Artemas...I read once that the plants couldn't take the hardness.
Naturally hard, alkaline water occurs in some lakes and streams, and plants grow in it. Plants, like fish, have evolved to fit nearly every niche. The trick is to find the plants that like your local water conditions.
Back when I was using 100% unsoftened tap water, I had great success with Amazon swords. Anubias species, Vallisneria, some Cryptocoryne species, Java moss, Java fern, many stem plants (especially water sprite), hornwort, frogbit, and (of course) duckweed. About the only thing I couldn't get to grow was Sagittara species. So don't worry, you'll have a lot of choices!
I am surprised at how few LFS are mentioned here in Omaha. We used to have more. Big box stores must be pushing them out.
I'm afraid that's exactly what's happening - and all over the country, not just here in Omaha. Local fish stores have small margins, and the big box places pull too much needed business away.