Arizona cypress (Cupressus arizonica var. glabra) is a southwestern U.S. conifer tree that is often underplanted. Soil drainage is an absolute must! Growth rate is moderate (15 feet high after 10 years) and eventually will reach 30-50 feet at maturity. (zones 7-9). I have seen multi-year specimens thriving in zone 6b. Deodar cedar (Cedrus deodara) is […]
Archive for the ‘Garden Maintenance’ Category
Some Conifers Don’t Like Summer Heat And Clay Soils
Most conifers are best grown in deep, moist, well-drained, acidic loamy soils and in full sun. In the deep South evergreen conifers are challenged by warm soils, poor soil drainage, and humidity. Humidity increases their susceptibility to diseases. Once established they are drought tolerant, but most fail in poorly drained wet soils. Many pine species […]
Zone 6 Hardy Camellias
Once upon a time, across the Southern U.S., camellias were highly prized for their showy flowers in the fall-winter landscape. What has changed is that gardeners in the Middle Atlantic and mid-Southern states can now grow them equally well. Camellias are evergreen woody shrubs native to Asia. Currently, after decades of inter-breeding with species from […]
Care Of Rhododendrons
In the U.S., two species of rhododendrons, Catawa (Rhododendron catawbiensis) and Rosebay (R. maximum), are plentiful in the Appalachian Mountain region. Their roots feed in part on the rich humus material in the rocky mountain soils. Over time fallen leaves, twigs, and flower parts decay into additional humus. Humus improves soil aeration and drainage, yet […]
February Blooming Hybrid Witchhazels
Witchhazels (Hamamelis spp.) are somewhat coarse, loosely-branched, medium to large, deciduous shrubs that typically grow 12-20 feet tall. (USDA hardiness zones 5-8). They are particularly noted for their strapped shape, often fragrant, mid- to late winter flowers which appear before the spring leaves emerge. Five cultivars were selected by Mr. Tim Brotzman, an Ohio nurseryman […]
Ten Stars Of The Winter Landscape
Here are 10 reliable plants that shine in my Tennessee garden (Zone 6-b) during the winter season: Witchhazels (Hamamelis spp.) –two species bloom in winter: (a). Vernal witchhazel (H. vernalis) blooms in mid- to late- January (zones 4-8). (b). Chinese witchhazel hybrids (H. x intermedia) dominate the month of February into March. – deciduous, large […]
Plant Disease Warning: Phytophthora ramorum
Known as “sudden oak death”, this serious plant disease (Phytophthora ramorum) (Pr) from the West Coast kills oak and other species of trees. It has caused devastating effects on the oak populations in California, Oregon, and Washington, and is also present in Europe. Symptoms include bleeding cankers on the tree’s trunk and dieback of foliage. […]
Zone 6 Hardy Camellias
In the Southern U.S., camellias are treasured for their showy flowers in the fall-winter landscape. Their glossy evergreen foliage looks great all year long. Hardy varieties are now available for zone 6 northern gardens (-10 to 0 °F). This means that gardeners in Tennessee, Kentucky, Virginia and most coastal cities in Eastern U.S. can grow […]