Arctic Sun&trade; Cornus sanguinea 'Cato' - Red Twig Dogwood-Very Hardy-Proven Winners Arctic SunRed Twig Dogwood Cornus sanguinea 'Cato'pp#19892; PBRAF Time of Bloom: Late Spring Hardy Zones 4-7 Correct Name: Cornus Immediate shipping. Size Shipped: 4" pot