Thankfully, this is not a very common problem that few gardeners run into. U.S. gardeners grow four (4) species of hydrangeas: smooth hydrangea (Hydrangea arborescens), oakleaf hydrangea (H. quercifolia), bigleaf hydrangea (H. macrophylla), and panicle hydrangea (H. paniculata). There are five reasons why some hydrangeas don’t bloom: 1. Type of hydrangea… Bigleaf hydrangeas, those that […]
Archive for the ‘Winter Protection’ Category
Grow Crocosmias In Your Summer Garden
Crocosmias are bulbous summer blooming flowering perennials that are closely related to gladiolas, also called montbretia and sword lilies. They’re actually corms, not bulbs, and are indigenous to South Africa (USDA hardiness zones 5b to 9). Crocosmias enjoy lots of sun, soil moisture, and hot temps to produce flowers. Plants prefer nutrient-rich, slightly acidic, moist, […]
Arborvitae Fern
Arborvitae fern (Selaginella braunii) is native to China (USDA hardiness zones 6-9). It is not a fern at all, but a Lycopod or “club moss”, a descendant of ancient spore-producing plants which date back to the Carboniferous and Permian Ages. Its small club shaped cones give it the plant moniker – ”club moss”. Arborvitae fern is a slowly creeping […]
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 […]
Russian Arborvitae For Cool Areas Of The U.S.
Russian arborvitae and Siberian cypress (Microbiota decussata) is an underutilize ground cover (USDA hardiness zones 3-7). This tough juniper-like evergreen hails from Siberia and demonstrates exceptional cold hardiness to -40 ° F. In extreme northerly sites, the lacy evergreen foliage may turn complete brown in the dead of winter and re-sprout in spring. In the cool temps of […]
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, […]
Monkey Puzzle Tree
Monkey puzzle tree or Chilian pine (Araucaria araucana) is an evergreen conifer that is indigenous to forested volcanic slopes in the Andes Mountains in Chile and Argentina (USDA Zone 7b-11). It is the national tree of Chile. It typically grows 60-70 feet tall and 30-35 feet wide, but frequently reaches 100 feet or more in height […]
Re-blooming Poinsettia This Fall
The winter holidays may be over, but your poinsettia plant is likely still looking pretty. If you opt to grow and re-bloom your plant next Christmas, follow this growing schedule. Keep the soil evenly moist and set the plant in bright daylight. Feed bi-monthly with a house plant fertilizer. Inspect and rid your plants of all […]
Prevent Leaf Burn on Evergreens This Winter
Winter foliage burn on evergreens is often most prevalent on boxwoods (Buxus), hollies (Ilex), rhododendron, and many kinds of conifers. Symptoms often develop when temperatures warm up in late winter and early spring. This type of winter damage is often misdiagnosed as an infectious disease or damage from excessively cold temperatures. Evergreens transpire (lose water […]
Outdoor Holiday Decorating With Poinsettias and Cyclamens
If you live in U.S. hardiness zones 3-7, December weather is ordinarily is too frigid to grow poinsettias and cyclamen outdoors. Southeastern U.S. cities like Charleston, SC, Savannah, GA, and northern parts of FL like Jacksonville, Tampa and Orlando enjoy mild December temperatures 50 º F. lies in zone 8 as well as most of the Dallas […]