Still blooming blue in October: 'Endless Summer' Hydrangea and Delphinium 'Royal Aspirations'.
People who come into the nursery looking for blue flowering plants are often looking for a particular blue, one that is not too purple. These two are that perfect blue. An annual in the same shade is Salvia patens, which because we haven't had a killing frost yet, is also still blooming this October.
We've been talking about putting together a talk and slide show for 2009 called "Black and Blue," in which we will try to make a compilation of all the black flowering and blue flowering perennials and shrubs we can think of.
Here's a partial list of some of the blues we've already come up with: Baptisia australis, Brunnera macrophylla, Lithodora diffusa, Campanula poscharskyana, and Corydalis flexuosa.
Some blue bulbs: Muscari armeniacum and Muscari 'Blue Spike' (Grape Hyacinth), Scilla siberica, Camassia cusickii, and Camassia quamash. We have all these bulb varieties in stock at the store now, so come on in and get some, so you can be blue next spring.