I did a second visit to the Mt. Cuba Center this past weekend. A week prior to that was their yearly Wildflower Celebration. Most of the wildflowers hadn't opened yet or at least very few of the individual plants had flowers, but most at least had one flower open somewhere in the gardens, including Twinleaf and Trout Lily to give you an idea of how early the blooming was. Overall though there weren't enough flowers to make for a dramatic impact as I was hoping.
I'm happy to report that there were more flowers open this past Saturday, and the spring gardens will probably be at their peak this up coming weekend May 8 - 10, 2015. Any longer then that and I'd fear the Virginia Bluebells will be past their prime as well as many of the Trilliums.
When you put a biannual in the ground it suddenly wants to put energy into producing its roots, instead of flowering and making seed... but there's a ticking clock that tells the plant it's time to die. This is a plant that needs to be planted at a specific time of year to stress it as little as possible.