True blue is a rare color for hardy hibiscus, especially on blooms that are this large. Even bigger than the popular Bluebird, Hawaii™'s cool–tone petals make a dramatic contrast to the red eye. These flowers energize the summer garden when little else is blooming. They draw in butterflies and other pollinators, but deer tend not to bother. Hibiscus syriacus, also known as Rose of Sharon, is handy if you love the look of tropical flowers, but need something more reliable in a cold climate. Rose of Sharon is woody, and these hard stems won't die back in the winter, standing up to cold weather better. The other big reason gardeners love syriacus is when they want a hibiscus tree. It naturally grows into a vase shape, but the woody stems can be manipulated into a nice tree shape. It's gorgeous architectural interest for a more formal landscape. Hibiscus syriacus 'Minsygrbl1'