Since frost flows downward, avoid planting them in low-lying spots known to be frost pockets.
Since the frost damage is generally caused when the early morning sun strikes the plants' frozen tissues, you should site your Azalea or Rhododendron where both leaves and flowers are protected from the early morning sun, and where they will adapt slowly to the increasing temperatures of the day. Any flowers blooming before the last spring frost are susceptible to damage. Many Azaleas and Rhododendrons are fully cold hardy, however a few of them have frost-resistant flowers.
Evergreen shrubs pacific northwest full#
Dwarf alpine species will tolerate full sun provided the soil is kept evenly moist. Most Rhododendrons will tolerate a more open site if sheltered from cold, dry winds. Choose a site with dappled shade in sheltered conditions.Their soil should be acidic, organic, moist, fertile and well-drained.Remember that the ability to grow Azaleas and Rhododendrons successfully depends also on the site selection and soil preparation. To be selected for such an award, a plant must have excellent foliage and flowers, have an attractive plant habit, be pest and disease resistant and be cold hardy for the region. Most of them have received the Rhododendron of the Year Award of the American Rhododendron Society. The following is a list of Azaleas and Rhododendrons recognized as proven performers in the Pacific Northwest region. Pacific Northwest region as a result of sea coast winds and other tough conditions.
All are fascinating.Īzaleas and Rhododendrons are members of the genus Rhododendron, one of the largest genera in the plant world which includes over 900 species and over 20,000 named hybrids of Rhododendrons and Azaleas. Attractive landscape plants in cool and moist climates, many varieties have been struggling in the U.S. Some are fragrant and others feature a wonderful foliage adding glorious fall color to the landscape. Their flowers range from the tiny and delicate blossoms of floriferous dwarf shrubs to the huge clusters or 'trusses' of tall growing hybrids and species. Evergreen or deciduous, they come in all shapes and sizes, from small, ground-hugging shrubs to large, tree-like specimens. Azaleas and Rhododendrons, with their magnificent flowers, are one of the best-loved sights of spring. Producing a blaze of color from early spring through the summer, and even into the fall, Azaleas and Rhododendrons are popular ornamental shrubs for gardens of all sizes.
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