photo: Dr. Alan Windham, UT Plant Pathologist The following is a real query sent to an Extension agent over the phone: “I have thousands of insects on 8 of my 10 maple trees. I fear they will kill my trees, one has already died. The insects huddle together. I am not positive they have wings, […]
Archive for the ‘Garden Problems’ Category
"My Maple Tree Is Being Invaded"
Posted by Hugh on June 21st, 2010
Posted in Garden Problems, Maples (Acer), Pests, Trees & Shrubs 
Comments Off on "My Maple Tree Is Being Invaded"New Hardier Gardenias
Posted by Hugh on June 18th, 2010
Old fashioned gardenias or cape jasmines (Gardenia jasminoides) are reliably hardy in USDA zones 7-b and 8. Plants require immediate protection when the outdoor temperatures dip below 15 to 20 degrees. The new hardier cultivars are compact growers, 2-4 feet tall and 3-4 feet wide. ‘Frost Proof’, Crown Jewel™, and Heaven Scent™ are three promising […]
Posted in acidic soil, Fertilizing plants, Gardenia, Insect (Pest) Problems, Planting tips, Pruning, Soil drainage, Spring flowering, Summer flowering, Summer heat tolerant, Trees & Shrubs, watering tips Comments Off on New Hardier GardeniasCatalpa 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 HatedFireBlight on Apples and Pears
Posted by Hugh on May 20th, 2010
Fireblight is a serious bacterial disease that afflicts apple and pear trees. Fireblight may appear in two distinct forms. From April to early May flowers and fruit clusters may blacken (die). From May to mid-June a more serious symptom (photo) is sudden dieback, almost overnight, of branch tips . Leaves appear as if someone had […]
Posted in Fruits & Vegetables, Garden Problems, Trees & Shrubs 
Tags: apple, fireblight Comments Off on FireBlight on Apples and PearsU.S. Native Viburnums And Viburnum Beetle Susceptibility
Posted by Hugh on February 16th, 2010
photo -Arrowwood viburnum in late summer A trip to Carolina Native Plants Nursery in Burnsville, NC gave me this idea to list those viburnums which are U.S. natives (USDA Hardiness zones 6 and 7). All are worthy for planting in your landscape in full sun except where noted. All attract birds and other wildlife to […]
Posted in acidic soil, Attracting birds, Insect (Pest) Problems, Native Plant, Ornamental fruit, Pesticide recommendations, Privacy Screen, Rabbit/deer Protection, Southern Appalachian Region, Spring flowering, Trees & Shrubs, Viburnum beetles, Viburnums Comments Off on U.S. Native Viburnums And Viburnum Beetle SusceptibilityPrivacy Screening – Avoid Using Leyland Cypress
Posted by Hugh on February 11th, 2010
‘Green Giant’ arborvitae and Cryptomeria (Japanese cedar) have proven more dependable over the years than Leyland cypress across Tennessee, Virginia, North Carolina, and South Carolina. Leyland cypress is susceptible to three serious foliar diseases. Some people love the faster growth of Leyland cypress. Leyland cypress may be weak-wooded, as reported by some gardeners this current […]
Posted in acidic soil, Arborvitae (Thuja spp.), Bagworms, Disease prone, Evergreen, Evergreens, Ilex (hollies), Landscape ideas, Leyland cypress, Privacy Screen, Southern Appalachian Region, Viburnums, watering tips Comments Off on Privacy Screening – Avoid Using Leyland CypressSalt Damage on Trees
Posted by Hugh on February 1st, 2010
Winter 2010 lingers on across Tennessee, Virginia and North Carolina. The white coating of de-icing salts over streets and highways can damage many trees and shrubs. Salt spray and salt deposits may also leach into the soil and become equally damaging. Plant species vary in their sensitivity to salt injury.Browning of the tips of needle […]
Why My Tree Or Shrub Doesn’t Bloom
Posted by Hugh on January 5th, 2010
Frustrated by a fruit tree or ornamental tree that does not bloom? There are 5 primary causes: Lack of sunlight – insufficient light reduces flower bud development Fertility – too much nitrogen fed to plants can over-stimulate vegetative growth, either delaying or preventing flower bud development Winter injury or chilling tender flower buds in one […]
Root Injury to Container Plants
Posted by Hugh on January 2nd, 2010
The 4 most common reasons why gardeners lose outdoor container plants during the winters are:1. Sub-freezing temps2. Soil freezing for long periods3. Waterlogged roots4. Dessication from dry winter winds Roots are not as cold hardy as above-ground shoots, trunks, branches, etc. Evergreen plants become more challenged when the soil media is frozen. Their leaves demand […]
‘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’ Boxwood
