Impatiens were almost extinct from garden centers for years due to downy mildew, which destroyed seed inventories. Now that disease-resistant cultivars have been created
With its silvery fronds and crimson midribs, the Japanese painted fern (Athyrium niponicum var. pictum) is a popular slow-growing shade garden plant.
The Begonia genus' wax begonias are fibrous-rooted plants with mounds of fleshy, waxy leaves ranging from dark green to bronze and loose clusters of little flowers that bloom
Tuberous begonias (Begonia Tuberosa Group) resemble wax begonias but seem distinct. These don't need much sun like wax begonias, but their massive leaves and neon-bright blossoms
Common bleeding heart (Lamprocapnos spectabilis) is a great perennial for north-facing walls. In April, this 2- to 3-foot shrub has clusters of pink and white blooms on arching stalks.
Flowers in May and June, periwinkle develops a viny mat 3 6 inches tall. It grows well around bleeding heart and other perennials, shrubs, and small trees.
Dry and gloomy gardens along north-facing walls. Eaves intercept rainwater, making these locations typically dry. Plants that thrive in dry shade are excellent for these situations.