All perennials, trees, and shrubs are subject to availability. If you are looking for a specific variety or color please call for availability. « Back to CatalogProfessor KippenburgPhoto courtesy of Walters Gardens, Inc. Category: Aster. Sub-Category: Plant AttributesPurple, Blue, 1' to 3', Full Sun Related Products: « Back to CatalogProfessor KippenburgPhoto courtesy of Walters Gardens, Inc.