Archive for the ‘Disease prone’ Category

How Drought Affects Our Landscape Trees*

Long term drought can be devastating on landscape and woodland trees. An environmentally stressed tree must expend additional energy to survive. Extremes of drought leads to decreases in trunk diameter and height growth, declining resistance to pests and diseases, less food production via photosynthesis, and in flower and fruit production. Symptoms of drought stress include wilted […]

Quest For The Perfect Tomato Continues

Improved disease resistance, fruit color, firmness, and flavor continues to be the main goals of tomato breeders around the U.S. Leaf and root diseases vary from one region to another across the country. Here in the eastern U.S.,  late blight resistance is of key interest. Over the past 33 years, Dr. Randy Gardner, tomato breeder extraordinaire in […]

Keep Your Eye on Red Buckeye

Red buckeye (Aesculus pavia) is shrubby or low branching tree maturing to a 15 – 20 feet in height and spread. This southeastern U. S. native is becoming more recognizable as a good choice as a landscape tree for a small urban garden. Plant the tree in either full to partial sunlight and in average well-drained soil. A tree may […]

Winter Daphnes Can Be A Rewarding Challenge

Native to China and Japan, winter or fragrant daphnes (Daphne odora) open to light pink or white flowers in winter and early spring in the southeastern U.S. and Pacific Northwest (USDA hardiness zones 7-9). Their welcome floral fragrance will pervade through your garden for nearly two weeks starting in late winter. Winter daphnes grow 3 to 4 […]

Facts About Garden Watering – How Much And When

Modern gardeners are using more efficient drip irrigation or soaker hoses. Water bills are less than overhead or oscillating systems.  You may opt to attach the hose to an automatic timer so you can irrigate in absentia. Water goes on and off anytime you select. In garden beds water plants deeply once weekly rather than a […]

Japanese Larch Is Preferred In Northern U.S.

Larches (Larix spp.) are majestic deciduous conifers in their northern ranges of their habitat (USDA hardiness zone 4 to 7). However, trees do not prosper in hot and humid summers south of USDA Zone 7. One of the best is Japanese larch (Larix kaempferi), but unfortunately, it is not commonly planted in U.S. landscapes. The tree averages 50-60 feet in height and 25-35 […]

Eastern White Pine Losses Continue

Environmental and pathogenic problems continue to take their toll on Eastern White Pine (Pinus strobus). This valued landscape and lumber tree is native in the Eastern U.S. and Canada (USDA zones 3-8). Climate change is likely contributing to recent losses of white pines due a number of serious disease and pest problems that are reducing tree numbers. Pests: A […]

Five Landscape Plants On The Gardeners’ Taboo List

To many people, maintaining a garden or landscape means a lot of hard work. Sometimes the weeds outgrow what you have planted. Some landscape plants promise a lot of beauty but deliver nothing but problems. Some trees are weak wooded, prone to pests or diseases, and outgrow their space. Some produce smelly odorous flowers. I urge […]

Fritillarias – Very Different Spring Flowering Bulb

Crown imperial (Fritillaria imperialis), aka fritillaria, is an impressive spring flowering bulb that is native of Southwestern Asia to the Himalayas (USDA hardiness zones 5-8). In late April to May, large drooping orange, red, or yellow bell-shaped flowers are topped by a small pineapple-like tufts of leaf-like bracts. The leafy fringe on top resembles a […]

Bedding Geraniums Excel In Cool Weather

                Over the past decade, the zonal or bedding class of geraniums (Pelargonium x hortorum) have become summer favorites in northern gardens (USDA hardiness zones 3-7). Geraniums thrive in cool weather, but are also widely planted in zones 9-10 gardens where winter temperatures are moderate. Increasing numbers of colorful varieties beautify flower beds and container gardens. Leaves are […]