Archive for the ‘winter hardiness’ Category

Many Shapes and Sizes Of Cryptomerias

  Japanese cedar, aka cryptomeria, (Cryptomeria japonica) is the national tree of Japan and is also indigenous to China (USDA hardiness zones 5 to 8).  Cryptomeria cultivars vary greatly from very dwarf to rounded shrubs to large tree forms. Needle-like foliage may be dark green, medium green, golden or contorted leaves. Cryptomerias tolerate hot humid summers and […]

Determining A Plant’s Cold Hardiness

On-line nursery catalogs and plant labels at garden centers list the hardiness of the trees, shrubs, vines, and perennials that they sell. Many years ago the U.S. Department of Agriculture (USDA) developed the hardiness rating scale based on geographic location from northern Canada to southern Mexico. Most U.S. gardeners live within Zones 3 to 11. Don’t know […]

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 […]

Nellie R. Stevens Holly

  Hollies and the winter season work well together. Female hollies with bright red fruits (yellow-fruited forms also) contrast with their glossy evergreen foliage. ‘Nellie R. Stevens’ holly (NRS), a female form, is a cross between English (Ilex aquifolium) and Chinese (I. cornuta) hollies. NRS is the popular holly choice in Southern landscapes (USDA hardiness zones 6 to 9). Hollies are dioecious, […]

Provide Space For Weeping Blue Atlas Cedar

Atlas cedar (Cedrus atlantica) hails from the Atlas Mountains in northern Morocco and Algeria (USDA hardiness zone 6-9). ‘Glauca Pendula’ is a popular weeping form with blue green needle foliage. It is found in limited quantities at full service garden centers. Mature forms of weeping blue atlas cedars take up lots of space. When young its natural weeping form perform as a […]

All About Mulches

                Mulches aid in retaining soil moisture and reducing weeding chores. Over the years organically-based mulches gradually improve garden soils. Organic mulches are basically recycled bark, branches, twigs and leaves (including needles). Frequently they are organic by-products from the logging industry. Grass clippings and straw are also mulch sources. Hay is usually  full […]

Emerald™ Arborvitae

Emerald™ or ‘Emerald Green’ arborvitae (Thuja occidentalis ‘Smaragd’) is not new shrub or cultivar. More than 3 generations of gardeners have used this unique form of eastern arborvitae as their “go to” evergreen shrub up and down the eastern coast and through the Midwest (USDA hardiness zones 3-7). Emerald is a semi-dwarf evergreen shrub with a […]

Lacebark Pine Is An Arboreal Gem

Lacebark pine (Pinus bungeana) is an arboreal gem which few gardeners are privileged to own (USDA hardiness zones 4-8). Hopefully, this will change. Lacebark is a lovely 3-needle pine with exquisite exfoliating bark which becomes more attractive as it ages. Bark mottling begins after 8-10 years, that’s worth the wait if you’re a young patient […]

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 […]

Species Tulips Thrive in Tough Spots

    Species tulips (mini-tulips) are tough! In the wild they grow in the winter environs and dry soils of Central Asia, the Middle East, and China (USDA hardiness zones 3-7). In gardens they prosper for many years in full to partial sun and in average soil with good drainage. Over the centuries mini-tulips have been improved. […]