'); The flowers are not a true blue like the name implies, instead they are just lighter colored than Shoal Creek. Chaste tree is one of the very few winter-hardy trees out there that sports true blue flowers (although they can also be pink, purple, or white). Terms of Service apply. Shop 3.74-gallon purple shoal creek chaste tree flowering tree in pot (l11058) in the trees section of Lowes.com This site is protected by reCAPTCHA and the Google Carefully placed cuts can encourage the shrub to put on new growth. Back to Top Buy Abbeville Blue Chaste Tree online. Photo: Texas A&M, Texas Superstar. 5 metres x 2 metres. It is one of the few temperate-zone species of Vitex, which is on the whole a genus of tropical and sub-tropical flowering plants. A hardy, drought tolerant, tall shrub with fragrant panicles of lavender blue flowers throughout the summer which has been known since ancient times. In cold winter areas in USDA Zones 5-6, it is more often grown as a 3-5' tall herbaceous perennial. For us Chastetree has been a permanent and welcome fixture in our gardens whereas Butterfly Bush sometimes gets decimated in a harsh winter (except for 'White Profusion' which has been permanent here).