Japanese Aucuba

Japanese aucuba is the broadleaf evergreen that thrives in the deep shade where almost nothing else survives. You have seen it in the dark strip between the house and the fence, under the eaves on the north side of the building, in the dense shade beneath a mature Douglas fir where the ground never fully dries but direct sunlight never reaches. The leaves are large, glossy, and leathery, and on female plants bright red berries persist through winter. The gold-spotted variegated forms are the ones most commonly sold, turning a dark corner into something that catches light and holds your attention.

In Western Washington, Japanese aucuba handles the conditions that kill most broadleaf evergreens. It takes full shade and still looks good, which is a short list of plants. It grows six to ten feet tall with an upright form, tolerates the heavy soils common to residential sites, and handles our wet winters without root issues if drainage is reasonable. Three diseases and three pests are tracked, including anthracnose and scale, but healthy specimens in appropriate sites rarely need treatment. The one vulnerability is cold: aucuba is rated Zone 6 to 7, and a sustained hard freeze below about fifteen degrees Fahrenheit will burn the foliage and can kill stems to the ground. In most Puget Sound lowland winters, this is not a concern. In the occasional arctic outbreak, exposed plants take damage. Site it with some overhead or structural protection from extreme cold and it will reward you with years of low-maintenance, year-round green in the toughest shade conditions you have.