440
Scientists uncovered the nutrients bees were missing — Colonies surged 15-fold
(www.sciencedaily.com)
This is a most excellent place for technology news and articles.
Several of those are going to be perennial and end up competing with mono-culture crops the following year(s) (not that I'm trying to defend mono-culture crops, but that's what they're planting). It's a good idea, but not necessarily as simple as you're implying. Still it's an idea that's not without some merit. The biggest obstacle to adoption is no one is making a significant profit off of it, so it's unlikely to see much uptake.
You aren't wrong, but soil can be turned over, and the wildflowers can be removed.
What about the seeds they dropped the year prior