Parrotia (Parrotia persica), aka “Persian ironwood”, is native to Iran, Turkey, and the Caucasus region. Parrotia forms a lovely carefree medium sized lawn or street tree. Tree framework is vase-shaped, initially narrow at the base and flaring out in the canopy as it ages. Mature tree height varies 25-40 feet, depending on location and the seedling or cultivar planted. Rated hardy in USDA […]
Archive for the ‘Disease resistant’ Category
‘Quasimodo’ Vernal Witchhazel
Vernal witchhazel (H. vernalis) is a dense growing 8-12 foot native shrub which blooms in mid-winter in the Southern Appalachian region (USDA zones 6 and 7). It is winter hardy to zone 4. Small ½ inch wide yellow to red flowers, flushed red at the base, emit a pleasant witchhazel aroma in February. Often, it is the […]
What Can Be Done About Phytophthora
Phytophthora disease (Phytophthora spp.) is the fatal cause of root rots, stem cankers and crown rots. Several hundred species of plants are susceptible, including redbuds, dogwoods, rhododendrons, camellias, white pines, firs, yews (Taxus spp.), and fruit trees. It thrives in warm moist saturated soils. Phytophthora may lie dormant in the soil for several years, waiting for a […]
Prickly Pear Is Easy Care
There are over 200 species of prickly pear cactus (Opuntia spp.) worldwide. Several make great container plants in the garden or inside the home. Prickly pear cacti may grow to heights of 10 feet or more in the arid regions of the Southwestern U.S. Eastern prickly pear (Opuntia compressa var. ‘humifusa’) grows 12- 18 inches tall and 30-36 inches wide. […]
Trifoliate Orange –The Barbed Wire of the Plant World
Trifoliate orange (Poncirus trifoliata) is a hardy citrus native to China. T-orange is hardy to -15° F. This strong growing large shrub or small tree can reach 15 to 20 feet in height. Its foliage is deciduous and compound, compared to citrus trees with single simple evergreen leaves. T-orange prefers full day or partial (minimum of 6 hours) […]
Disease Free Apple Varieties
Over the past 30 years, the goal has been to develop good eating and storing apples which are not susceptible to four major diseases. The first 3 cultivars released were ‘Prima’, ‘Priscilla’, and ‘Sir Prize’, but they lacked great flavor and storage quality. Apples are susceptible to four serious diseases: apple scab, cedar-apple rust, fireblight, and powdery mildew. Scab, rust and mildew […]
Dwarfing Rootstocks for Apple Trees
No more climbing ladders to pick apples. Less waiting for first harvest for newly planted tree. These are some of the reasons for planting dwarf apple trees. Over the past 100 years numerous dwarf rootstocks have been introduced. In addition to the degree of dwarfing, some rootstocks are more disease and insect resistant. The original East […]
‘Morgan’ Oriental Arborvitae
Among dwarf conifer collectors, ‘Morgan’ Oriental arborvitae (Platycladus orientalis) has become one of the most sought out evergreens over the past decade. Its oval form and seasonal coloration makes Morgan a standout. It performs well in part sun, but its chartreuse-yellow foliage appears more vibrant in direct sunlight. Its dense foliage grows in vertical layers. Andy Pulte at the […]
Making A Case for Mugo Pine
Mugo pine (Pinus mugo) is a slow growing needle evergreen shrub of variable heights ranging from 5 feet to 20 feet and more. Mature height depends on the cultivar planted and environmental conditions on site. Mugo pine is native over many hundreds of miles of alpine climes across Europe. It is winter hardy in USDA zones […]
Alaska Cedar Is Awesome Weeping Evergreen
Over the past decade, gardeners have been planting different evergreen trees in their Southern Appalachian landscapes (USDA zones 6 and 7). One of the newbies is Alaska cedar (Chamaecyparis nootkatensis), a wonderful medium-sized evergreen tree from the west coast of North America. Alaska cedar matures into a graceful pyramidal tree form. Long pendulous flattened sprays of bluish green needles drape from […]