It is usually quite difficult to determine why a shrub or tree fails to bloom. Most often the problem is the plant’s health, related to weather or environmental factors. Sometimes, the gardener has grown the plant poorly. Here are the seven leading causes: High much nitrogen? The nitrogen to carbohydrate ratio (C:N) is a common […]
Posted in Failure to Bloom, Featured, Garden Maintenance, Garden Problems 
Comments Off on Failure of Shrubs and Trees to BloomPhoto: walnut twig beetle infestation Tennessee Department of Agriculture (TDA) officials urge state residents and visitors to the state to help prevent the spread of Thousand Cankers Disease in black walnut (Juglans nigra)trees and Emerald Ash Borer in ash species (Fraxinus spp.). Take the following steps: Don’t transport firewood, even within Tennessee. Don’t bring […]
A generation of gardeners have extolled the benefits of mulching around trees and flower beds. Sometimes, mulching is not a good practice. Often, a heavy clay soil retains too much moisture over the winter months. Some dryland perennials, such as cheddar pinks (dianthus), euphorbia, and delospermum, prefer dry to moderately wet winter soils. Amending with […]
Posted in Garden Problems, mulching, Pests, poor quality mulch Comments Off on Mulching- Not Always a Good PracticeMidwest 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)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, […]
Posted in Garden Problems, Maples (Acer), Pests, Trees & Shrubs Comments Off on "My Maple Tree Is Being Invaded"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 GardeniasNorthern 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 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 Pearsphoto -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 Susceptibility‘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 Cypress
