‘Autumn Ruby’ Encore azalea in April 2009 Photo credit: Dr. Alan Windham, Extension Plant Pathologist, University of Tennessee Encore Azaleas™ bloom twice: in the spring and from late summer into the fall season.Ten varieties consistently exhibited cold hardiness throughout zones 6-a and 6-b: Autumn Amethyst, Autumn Carnation, Autumn Cheer, Autumn Lilac, Autumn Royalty, Autumn Ruby, […]
Archive for the ‘winter hardiness’ Category
Culver’s Root (Veronicastrum)
Posted by Hugh on June 28th, 2010
Midwest native Culver’s root (Veronicastrum virginicum) starts the summer flowering season in my perennial garden. It naturally grows in open woods and meadows and thrives in fertile to moist soils. However, this deep rooted plant hasn’t complain about the current dry period in the Southern Appalachian region (USDA zones 6-7). Be aware that culver’s root […]
Posted in acidic soil, Aggressive grower, alkaline soil, Attracting Butterflies, Bee Favorite, Bees and other pollinators, Beneficial insects, Butterflies, Culver's Root (veronicastrum), deadheading, Drought tolerant, Fertilizing plants, Goldenrod (Solidago), Heat Tolerance, mulching, Native Plant, Perennials, Planting tips, Propagation (Cuttings), Propagation (dividing), Soil drainage, Southern Appalachian Region, Summer flowering, Summer heat tolerant, watering tips, winter hardiness 
Comments Off on Culver’s Root (Veronicastrum)Agapanthus- Hardiness Issues
Posted by Hugh on June 25th, 2010
Lovely agapanthus (Lily of the Nile) is native to South Africa and is not reliably hardy in the Southern Appalachian region (zones 6 – 7). Many small tubular flowers comprise each ball -shaped (umbel) flower cluster. Tall sturdy floral scapes rise 1 to 4 feet in height, blooming from late spring into late summer depending […]
Catalpa Both Loved And Hated
Posted by Hugh on June 8th, 2010
Northern catalpa or Indian cigar tree (Catalpa speciosa) has enormous presence in any landscape setting (USDA hardiness zones 4-8). Finding a 70 – 80 foot tree with a massive trunk and thick sinuous limbs is not unusual from Ohio south thru Tennessee. In summer its huge heart –shaped, pale green leaves may be easily reach […]
Posted in acidic soil, Aggressive grower, Disease resistant, Drought tolerant, Heat Tolerance, Hummingbird, Large Shade trees, Native Plant, Southern Appalachian Region, Spring flowering, Trees & Shrubs, winter hardiness Comments Off on Catalpa Both Loved And HatedBest of Perennial Veronicas for Gardens
Posted by Hugh on March 17th, 2010
Chicago Botanic Garden (CBG) has published the results of a 10-year study of speedwells (Veronica and Veronicastrum) in its 33rd issue of Plant Evaluation Notes, “A Comparative Study of Veronica and Veronicastrum“. Seven speedwells received good-excellent ratings for their overall performance, including Veronica ‘Fairytale’, V. ‘Giles Van Hees’, V. austriaca ‘Ionian Skies’, V. longifolia ‘Blue […]
Posted in acidic soil, Fertilizing plants, Perennials, Propagation (Cuttings), Summer flowering, Summer heat tolerant, Veronica (speedwells), watering tips, winter hardiness Comments Off on Best of Perennial Veronicas for Gardens‘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’ BoxwoodHardy 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 CedarGrowing Hardy Camellias
Posted by Hugh on September 22nd, 2009
Growing camellias in Tennessee is no longer a dream. Through the efforts of several plant breeders, particularly Dr. William L. Ackerman of the U.S. National Arboretum (retired) and Dr. Clifford Parks of Camellia Forest Nursery, as many as 40 cultivars of winter hardy camellias to -15 °F are now available in nursery commerce. Flower colors […]
Posted in acidic soil, Autumn flowering, Camellia, compost, Fertilizing plants, Flowering, Southern Appalachian Region, Spring flowering, Trees & Shrubs, watering tips, Winter Garden Interest, winter hardiness, Winter Protection Comments Off on Growing Hardy Camellias
