If you garden in USDA zone 6, certain crape myrtle cultivars are rated as reliably winter hardy perennials. Most dependable are the U.S. National Arboretum cultivars released starting in the 1980’s to date. Each one is named for an Indian tribe. Most of the National Arboretum cultivars are selected for cold hardiness as well as for disease and insect resistance. Among the […]
Archive for the ‘Trees & Shrubs’ Category
Winter Hardiness of Crape Myrtles
Posted by Hugh on August 25th, 2012
Posted in acidic soil, alkaline soil, compact shrub, compact tree, Crape myrtle (Lagerstroemia), Disease resistant, Drought tolerant, Heat Tolerance, Southern Appalachian Region, Summer flowering, winter hardiness 
Comments Off on Winter Hardiness of Crape Myrtles‘Senorita Rosalita’ – A Welcome Spider Flower Addition
Posted by Hugh on August 23rd, 2012
Cleome or spider flower (Cleome hassleriana) is the 5-6 foot flowering annual that your grandmother grew in her garden. Long stamens extending from the flowers look like spider legs, hence the common name. The old fashioned varieties produced lots of seed pods which meant lots of weed seed in next year’s garden. As summer temperatures […]
Posted in acidic soil, alkaline soil, Butterflies, Container growing, Disease resistant, Drought tolerant, Southern Appalachian Region, Spider flower (Cleome), Spring flowering, Summer flowering, Summer heat tolerant, watering tips Comments Off on ‘Senorita Rosalita’ – A Welcome Spider Flower AdditionFall In Love With Sweetheart Tree
Posted by Hugh on August 20th, 2012
The late J.C. Raulston introduced euscaphus tree (Euscaphus japonica) to gardeners in the 1980’s. Tennessee nurseryman Don Shadow is credited with naming it “Korean sweetheart tree” which has become its more popular name. It is reliably winter hardy to USDA zone 6-b. Sweetheart tree is a small 15-20 foot tree or large shrub. The pinnately compound foliage is […]
Posted in acidic soil, compost, Disease resistant, Heat Tolerance, Ornamental fruit, Southern Appalachian Region, Spring flowering, Summer heat tolerant, Sweetheart tree (Euscaphis), Winter Garden Interest Comments Off on Fall In Love With Sweetheart TreeStrong Vertical Presence of Serbian Spruce
Posted by Hugh on August 17th, 2012
Serbian spruce (Picea omorika) rises as a tall spire in the urban landscape. A mature tree may reach 50 to 60 feet high and it creates a narrow footprint of 15 to 25 feet wide. Lateral branches uniquely bend downward while the growing tips sweep gracefully upward. Annual growth rate is slow at 12-15 inches. Two-thirds of the short dark green needles lay […]
Posted in acidic soil, Evergreens, Green Privacy Screen, Heat Tolerance, Serbian spruce, Southern Appalachian Region, Spruces (Picea spp.), winter hardiness Comments Off on Strong Vertical Presence of Serbian SpruceDawn Redwood Is Back From Extinction
Posted by Hugh on August 1st, 2012
Dawn redwood (Metasequoia glyptostroboides) was thought to be extinct until the mid-twentieth century. In 1948 dawn redwood was re-introduced into North America from Sichuan-Hubei Provinces in China. Dawn redwood grows in full sun and in well-drained, compost-rich soil. The tree struggles in dry or high pH soils. Dawn redwood will tolerate standing water for a […]
Posted in acidic soil, Bald cypress (Taxodium), Dawn redwood (Metasequoia), Disease resistant, Disease resistant, Heat Tolerance, Japanese beetles, Soil drainage, Southern Appalachian Region, Summer heat tolerant, Trees & Shrubs, watering evergreens Comments Off on Dawn Redwood Is Back From ExtinctionBoxwood Blight Discovered on Pachysandra
Posted by Hugh on July 30th, 2012
In June 2012 plant pathologists at the Connecticut Agricultural Experiment Station have confirmed a natural infection of pachysandra in the landscape by boxwood blight (Cylindrocladium pseudonaviculatum), the boxwood blight fungus. The infection originated from recently installed balled and burlapped (B&B) boxwood plants. A plant inspector in Fairfield, CT noticed that an established bed of pachysandra […]
Posted in Boxwood (Buxus), Disease prone, Disease resistant, Evergreen, Ground cover, Pachysandra, Southern Appalachian Region Comments Off on Boxwood Blight Discovered on Pachysandra‘Sunburst’ Golden St. John’s Wort
Posted by Hugh on July 16th, 2012
Our native golden St. John’s wort (Hypericum frondosum) deserves more planting space in U. S. gardens (USDA hardiness zones 5-8). ‘Sunburst’ is the leading cultivar and exhibits superior traits over the species. Golden St. John’s wort forms a small, dense growing deciduous shrub, noted for its showy golden yellow flowers and attractive blue-green foliage. Sunburst grows more compact […]
Posted in acidic soil, alkaline soil, Butterflies, compact shrub, Disease resistant, Drought tolerant, Evergreens, Flowering, Heat Tolerance, Native Plant, Ornamental fruit, Pruning, Soil drainage, Southern Appalachian Region, Spring flowering, St. John's Wort (Hypericum), Summer flowering, Summer heat tolerant, Winter bark Comments Off on ‘Sunburst’ Golden St. John’s Wort‘Brigadoon’ Hypericum Wakes Up a Garden Bed
Posted by Hugh on July 13th, 2012
The bright chartreuse (almost golden) foliage Brigadoon St. John’s wort (Hypericum calycinum ‘Brigadoon’) can brighten up almost any dull garden spot. This Euro-Asian ground cover thrives in any well-drained soil under full to partial sunlight (USDA zones 4-7). Full sun may burn the summer foliage in zone 7. ‘Brigadoon’ grows 12 to 16 inches tall and spreads […]
Posted in Butterflies, Disease resistant, Drought tolerant, Ground cover, Heat Tolerance, Planting tips, Pruning, Root suckering, Southern Appalachian Region, Spring flowering, St. John's Wort (Hypericum), Summer flowering Comments Off on ‘Brigadoon’ Hypericum Wakes Up a Garden BedSelecting The Right Ivy For Your Garden
Posted by Hugh on July 5th, 2012
Have you taken the “No Ivy Pledge”? I have not. In an effort to slow defections from growing ivy, the American Ivy Society has developed a list of non-invasive cultivars. It includes several dwarf English ivy cultivars (Hedera spp.). Add a little water and fertilizer and these mini-ivies do not miss a beat. Mini- ivies […]
Posted in Aggressive grower, Evergreens, Ivy (Hedera), Planting tips, Southern Appalachian Region, Vine, watering tips Comments Off on Selecting The Right Ivy For Your GardenPromising Hemlock Adelgid Research
Posted by Hugh on July 2nd, 2012
Proper care of hemlock trees is important for their survival. Hot dry summer weather appears to slow population growth. During periods of severe drought, shallow rooted hemlock trees should be irrigated. Prune dead and dying branches from trees to promote new growth. Also, limit the amount of nitrogen fertilizers to hemlock(s), as it promotes heavier […]
Posted in Evergreens, Hemlock (Tsuga), Hemlock woolly adelgid, Native Plant, plant nutrition, Southern Appalachian Region, watering tips Comments Off on Promising Hemlock Adelgid Research
