Wildflowers are amazing with their appearance only where it suits them. Some will be along country roads, while others are far more particular and only appear in very select places-- a certain elevation, certain amount of moisture, and for a time to suit themselves. There are a few that will bloom all summer, although never in as much profusion as their first bloom. A few make their fans work for any sight of them.
One of the things we always aim to do is get to Beazell Memorial Forest when the larkspur are at their peak. I've never been anywhere with so many forming a lush garden. We've made it there some years and others arrived too early and then too late. This happens to also be a busy time on the farm.
The larkspur are in lush profusion in one main area right alongside the small creek. This year, we were there a few times, ahead of the bloom, thought we might have missed it, but finally hit it just right. They are almost impossible to photograph because their blue is very similar in value to all the green surrounding them.
After reading the above link, I may try again to get them started along our creek. At one time it had livestock foraging along its banks. Pretty well the death of any such plants. Now it's fenced off; so maybe...