Archive for the ‘Disease resistant’ Category

New Christmas Roses (Hellebores) Greatly Improved

  Christmas roses (Helleborus niger) is a winter flowering perennial. It is native to central and southern Europe (USDA hardiness zones 4-8) and is not as winter hardy as lenten rose (Helleborus x orientalis). Christmas rose tends to flower 1 to 4 weeks earlier, around the Christmas holidays in southern climes (zones 7-8). New selections of H. niger are better […]

List of Zone 6 Hardy Camellias Grows Longer

                If you live and garden in USDA hardiness zone 6, several camellia cultivars are winter hardy. The past decade has seen an increase in the list of hardy cultivars. These same cultivars are also reliable planted in zone 7. Here is a sampling of the best Zone […]

Tips On Crape Myrtles In Fall And Winter

                  Hardy cultivars of crape myrtles are best left alone in the fall. Light pruning to remove a broken branch or the seed capsules is ok, but major pruning should wait until early spring.  “Crape murder” is a common practice in the Southeast U.S. and is not recommended any time or place. It involves lopping […]

Better Choices Than Leyland Cypress For Privacy Screen

For homeowners in a rush to establish a tall green privacy screen from the neighbor(s), perhaps a 12-foot tall green fence may be your better option. Among the choices of evergreens to plant, Leyland cypress (x Cupressocyperus leylandii) is fastest growing, but is plagued by any of three serious disease problems. An established leyland cypress planted 12 feet apart completely […]

‘Gyokuryu’ Japanese Cedar -Privacy Screen For Small Gardens

Gyokuryu Japanese cedar (Cryptomeria japonica ‘Gyokuryu’) is a dense, broadly pyramidal evergreen shrub (USDA hardiness zones 5-8). It has short stiff needles that tend to be a slightly darker green than other cryptomeria cultivars. Gyokuryu holds its dark green color through most winters in zone 7 and further south. Expect winter bronzing when Gyokuryu is […]

Bee Bee Tree (Tetradium) Rarely Seen In U.S. Landscapes

                  Native to Korea and southwestern China, bee bee tree (Tetradium daniellii) is a deciduous tree with a spreading umbrella-shaped habit and rounded canopy (USDA hardiness zones 4-8). It was formerly named Evodia daniellii. Bee bee tree typically grows to 25-30 feet tall and wide. In July-August small […]

Swamp Milkweed Is Monarch Butterfly’s Favorite

Swamp milkweed (Asclepias incarnata) is an erect, clump-forming, U.S. native plant indigenous to swamps, bottomlands and wet meadows (USDA hardiness zones 3 to 6). Obviously, it prefers moist soils but grows equally well in average, well-drained garden soils. Full sun is best, but copes with some light shade. As its common name indicates, it makes […]

Tall Sedum – The New Mailbox Plant

Tall sedums (Sedum x spectabile) are a popular late summer blooming perennial often nicknamed “showy stonecrops” (USDA hardiness zones 3-9). Members of the succulent plant family, tall sedums have thick round leaves and are recognized for their drought resistance. Star shaped flowers are clustered in colors ranging from whites, pinks, and reds, depending on the […]

Versatile Long-blooming Catmints

Catmint (Nepeta spp.) is a favorite of cats who like to roll around in it, sometimes to the detriment of the plant(s) (USDA hardiness zones 3-8). There are several species of catmint. Most popular are the gray-green leafed N. x faassenii and hairy gray heart-shaped leafed N. racemosa. Depending on the cultivar selected, this versatile […]

Japanese Pagoda Tree Becoming Popular In U.S. Cities

U.S. east coast cities are finally planting Japanese Pagodatree (Styphnolobium japonicum). This medium-sized tree grows to 50 feet high, but 75 feet is not uncommon in the southeastern U.S. Pagodatree is native to eastern Asia (USDA hardiness zones 4 –8) where it is more known as Scholar tree. In the early 20th century it was […]