Containers filled with shrubs and perennials, doesn’t necessarily ensure their winter survival. Without adequate cold protection plants may succumb to cold injury—turning them into dead annuals. To over-winter perennials in containers, you need to know their root and shoot temperature hardiness. Often, plant hardiness ratings is listed on the label. Roots and shoots of several […]
Archive for the ‘Cold tolerance’ Category
ALL ABOUT ASTILBES
Astilbes, aka false spireas or false goat’s beard, brighten shady gardens with their colorful blooms in early summer. Their plume-like flowers stand tall above astilbe’s deep green lacy foliage. Flower colors vary from white, pinks, and reds, including lavender and violet. Flowers attract butterflies and other pollinators. Astilbes are generally planted in spring when the soil […]
Growing Cyclamen In The Home
Cyclamens, the non-hardy forms, have become popular gift plants. Cyclamens are incorrectly labelled as tropical houseplants at garden shops. Many people enjoy this flowering plant for long as possible and toss it once blooming has stopped. Cyclamens enjoy a long blooming period indoors in a cool room and are fussy, a bit of a challenge […]
Care Of Rhododendrons
In the U.S., two species of rhododendrons, Catawa (Rhododendron catawbiensis) and Rosebay (R. maximum), are plentiful in the Appalachian Mountain region. Their roots feed in part on the rich humus material in the rocky mountain soils. Over time fallen leaves, twigs, and flower parts decay into additional humus. Humus improves soil aeration and drainage, yet […]
Black Mondo Grass
Black mondo grass or black lilyturf (Ophiopogon planiscapus) is sold as a number of cultivars – ‘Arabicus’, ‘Black Dragon’, ‘Nigrescens’, or ‘Ebony Knight’. This stoloniferous grass-like perennial belongs to the lily family (Liliaceae) (USDA hardiness zones 6-9). Its blackish-purple foliage (3/16 inch wide leaf blades) forms lush arching clumps. For the patient gardener, know that […]
Temperamental Big Leaf Hydrangeas
Get use to it… big leaf hydrangeas (Hydrangea macrophylla), also called hortensia hydrangeas, are temperamental (USDA hardiness zones 6-9). After a long winter of sub-freezing temperatures, these blue (or pink) flowering shrubs should be stunningly beautiful in spring. However, if the late winter- early spring temps flucuate wildly, grab your pruning shears. Too most gardeners, myself included, […]
American Hornbeam – Versatile Small U.S. Native Tree
American hornbeam (Carpinus caroliniana), aka ironwood or muscle wood, grows primarily in moist, slightly acidic soils along woodland rivers and streams (USDA hardiness zones 3-9). This native hornbeam adapts to either wet or dry ground as long as soil moisture drains off, and it does not flood over long periods. This durable small tree copes with […]