(Forysthia Sage) This statuesque perennial grows up to 10 feet tall, but spreads only 3 feet wide. It is a late bloomer from Mexico's Sierra Madre Oriental mountains where it grows at altitudes of 4,000 to 5,000 feet and tolerates temperatures down to 20 degrees F.
Short periods of colder temperatures don't kill this tough sage. When knocked out by frigid weather, it usually comes back from root stock. A single plant forms a multi-stemmed thicket through slowly spreading rootstock, but can easily be kept tidy by removing unwanted stems.
Give this sage morning sun and afternoon shade as well as ample water. From fall until frost -- or into spring in mild winter areas -- it will reward you with buttery yellow flowers that make this shrub look like a Forsythia from a distance. But get up close and you will notice that it has roughly textured, heart shaped leaves as well as thick, square stems.
You can grow Forsythia Sage as a screen, border or background plant. It even does well in containers. We love to plant Bog Sage, Salvia uliginosa at its base for a bright blue floral contrast.