‘Joy’ ‘Mist’ ‘Snow’ ‘Blush’ Powdery mildew has become more of a problem across the southeastern U.S. over the past ten years on flowering dogwood (Cornus florida). University of Tennessee plant scientists have developed a series of mildew resistant dogwoods (pictured above). Each cultivar is sold under the Appalachian series of dogwoods. In cool spring climates, […]
Archive for the ‘Trees & Shrubs’ Category
Trees for the Urban Environment
Posted by Hugh on January 8th, 2010
Sulfur dioxide, nitrogen oxides, carbon monoxide, chlorine, fluorine, and ozone are the leading air pollutants that injure tree and shrub foliage in the Tennessee urban landscape. A single tree, depending on species and the genetic (cultivar), may respond differently to particulate and gaseous pollutants. The stage of growth and how close it is growing near […]
Coral Bark Maple Blazes in the Winter Landscape
Posted by Hugh on January 1st, 2010
Sango kaku Japanese maple (Acer palmatum ‘Sango kaku’) has light green summer foliage on a fairly upright branches. In the fall, foliage turns yellow-gold with some light tints of red, otherwise a very ordinary tree. It’s in the fall and winter seasons when this 20-25 foot ornate maple excels. The green branches and twigs turn […]
‘Sky Pencil Holly vs ‘Dee Runk’ Boxwood
Posted by Hugh on December 28th, 2009
Boxwoods and hollies are mainline evergreen shrubs, utilized for low hedging, privacy barriers. Single shrubs are planted solely for their architectural accent. Both hollies and boxwoods grow best in moist, well-drained soils and in full sun to partial shade. Both prefer soils with a pH of slightly acidic to slightly alkaline. Boxwoods tend to be more shade tolerant than […]
Posted in acidic soil, Bees and other pollinators, Boxwood (Buxus), Container garden, container shrub, Drought tolerant, Evergreen, Evergreens, Fertilizing plants, Ilex (hollies), Landscape ideas, mulching, Planting tips, Propagation (Cuttings), Pruning, Purchasing Plants, Soil drainage, Soil pH, Southern Appalachian Region, Trees & Shrubs, watering tips, Weak branching, Wind protection, winter hardiness 
Comments Off on ‘Sky Pencil Holly vs ‘Dee Runk’ BoxwoodPlanting Leyland Cypress May Be Big Mistake
Posted by Hugh on December 23rd, 2009
If you live in USDA Plant Zone 6-b – 7, planting leyland cypress (x Cupressocyparis leylandii) could eventually turn into a maintenance diseaster in your landscape. Leyland cypress is a green behemoth, too fast and aggressive for most folks to handle. Ask yourself, “do you really need a 60-70 foot evergreen privacy screen around your […]
Beware of Storm Damaged Trees
Posted by Hugh on December 20th, 2009
This past weekend Northeast Tennessee as well as most of the coastal eastern U.S. was hit by heavy snow, 7 inches and more of heavy, wet clinging snow. Many of my neighbors lost electric power, telephone and cable. A driveby survey of tree damage around the neighborhood found that the following tree species suffered the […]
Posted in Elms (Ulmus), Maples (Acer), Pear (Ornamental), Pines (Pinus spp.), Pruning, Southern Appalachian Region, Trees & Shrubs, winter injury Comments Off on Beware of Storm Damaged TreesKeep Your Pansy Faces Smiling
Posted by Hugh on December 18th, 2009
Success in blooming pansies and violas in the winter season depends on two key factors: date of fall planting and soil nutrition. If you live in USDA plant zone 6, pansies must be planted on or before October 15th, two weeks earlier in northerly zone 5, or two weeks later in zone 7. Early fall planting […]
Posted in Autumn flowering, Container garden, Flowering, Flowers, Landscape ideas, Pansies, Purchasing Plants, Southern Appalachian Region, Spring flowering, Violas, Winter flowering Comments Off on Keep Your Pansy Faces SmilingDogwoods for Spring
Posted by Hugh on December 18th, 2009
Five disease resistant varieties of flowering dogwood (Cornus florida), released by the University of Tennessee in Knoxville, are available at local garden centers this spring. Supply should be better than in past years. Powdery mildew resistant varieties: ‘Appalachian Snow’ (pictured), ‘Appalachian Blush’ and ‘Appalachian Mist’. In addition, ‘Cherokee Brave’, with dark pink flowers, exhibits good mildew resistance. […]
Posted in Attracting birds, Bees and other pollinators, Dogwood (Cornus), Landscape ideas, Native Plant, Ornamental fruit, Purchasing Plants, Soil drainage, Southern Appalachian Region, Spring flowering, Trees & Shrubs Comments Off on Dogwoods for SpringPoet’s laurel-great shade garden shrub
Posted by Hugh on December 18th, 2009
Alexandrian laurel or poet’s laurel (Danae racemosa) is a lovely 2-4 foot, low arching, evergreen shrub. It thrives in shady areas of the garden, spreading slowly from root suckers. Poet’s laurel stays in its intended place and does not overwhelm other plants around it. Tiny greenish-white flowers appear in late spring and are often overlooked. […]
Hardy Forms of Deodara Cedar
Posted by Hugh on October 3rd, 2009
I am surprised by the increasing numbers of deodara cedars (Cedrus deodara) that are prospering in Zones 6-b and 7 gardens. Apparently, deodara cedars are much hardier than once thought. The buzz at a recent American Conifer Regional meeting is these varieties list here are worthy of planting: Tree forms: ‘Karl Fuchs’ ‘Shalimar’ ‘Eisregen’ ‘Eiswinter’ ‘Polar […]
Posted in acidic soil, Deodara cedars (Cedrus), Disease resistant, Drought tolerant, Evergreens, Landscape ideas, mulching, Propagation(grafting), Purchasing Plants, Soil drainage, Southern Appalachian Region, watering tips, Winter Garden Interest, winter hardiness, Winter Protection Comments Off on Hardy Forms of Deodara Cedar
