Water may be a blessing or a curse. Gardeners usually want abundant rain to nurture their plantings and generally have a back-up irrigation plan for dry spells. Providing the right amount of water for each plant is one of the keys to a gardener’s success. Working With the Water Cycle Just as leaves absorb carbon from the air, so roots absorb water from the soil. The water, and any chemicals or elements dissolved in it, may be stored in...
Q. My crape myrtles have splits on the bark. What is going on? A. Your crape myrtles appear to have sun scald. Crape myrtles, Lagerstroemia indica, are considered a relatively problem-free tree. The Clemson Cooperative Extension website cites the most common problems as powdery mildew, Cercospora leaf spot, aphids, Japanese beetles, sooty mold, and the recently recognized crape myrtle bark scale. Clearly, the photo of your tree shows no indications of any of these diseases and insects. Your tree likely...
Q. My Zephirine Drouhin climbing rose looks odd. There are “frilly” growths, and the buds are very small. Should I be worried? A. The Heirloom Roses website description of Rosa ‘Zephirine Drouhin’ states that it “may be the most consistently blooming, large, flowered climbing rose, with the added benefit that it is thorn-less.” The variety is thought to have originated in France in 1868. Your rose appears to be infected with rose rosette virus (RRV). This is a virus spread...
Q: Something is growing on the bark of my tree. Is that a problem? A: It depends. If it is flat and looks rather lacy, it’s lichen and does not harm the tree. If the growth on your tree bark is shaped like a shelf and looks like a mushroom, it is a conk. Conks indicate that the tree has internal decay. Lichen is a symbiotic relation between certain types of fungi and algae. They have a very shallow attachment...
Q: I usually apply a pre-emergent herbicide in spring to kill chickweed. Is it OK if I go ahead and apply the pre-emergent now? A. No. The use of a pre-emergent herbicide in winter would be ineffective because the weather is too cold for seeds to germinate. We tend to associate pre-emergents with spring because that is when we apply them to take care of crabgrass and other summer broadleaf weeds. I know for my lawn, applying pre-emergent herbicide is...
Recognizing and identifying trees can be a great pleasure. Knowing trees well enough to understand how they fit into the local ecosystem, and how they can be used, allows us to look around at the trees in our community with even greater appreciation. But there are so many trees! How can you learn to identify them without carrying around a heavy field guide? This was our quandary as my novice Tree Steward colleagues and I began a project to...
The Williamsburg area has recently been rezoned by the USDA to a slightly warmer Zone 8a. But temperatures can still get down to 5°F or -15 °C, although we don’t typically see temperatures much below the 20s. So as we pull out our gloves and coats, here are some simple things we can do even now to prepare for when extreme cold weather is in the forecast. Tips for Protecting Plants Potted shrubs and perennials hardy to Zone 6 or...
In late autumn, the Williamsburg area woods light up with evergreen holly trees as the hardwoods lose their leaves. It is their time to sparkle in the winter sunshine. Their broad, prickly leaves are waxy on top, reflecting what light reaches them through the forest canopy. Unobtrusive throughout the summer, hollies are among the few forest trees, along with wax myrtle, pines, cedars, and magnolias, which remain bright green and covered in leaves throughout the year. Holly King Legends...
From November through May we can admire the living mathematics of the trunks and branches of hardwood trees. Their leafy crowns have fallen, and their beautiful bark in all its silvery, marbled, textured variety is revealed once again. Looking up, we sometimes see lively green clusters of mistletoe shining in the treetops. These shrubby, evergreen plants have been a part of myth and folklore since ancient times. They live suspended between heaven and Earth, rooted into the branches of...
Cardinals nest in a large evergreen shrub beside my kitchen window. Though the shrub, Ligustrum, is frowned upon by many contemporary gardeners as invasive, the birds don’t know that. They delight in its abundant berries and the insects that visit year-round. We delight in watching the birds come and go, even as they peer in the windows at us. We amuse one another. Cardinals, titmice and other birds also perch in the crape myrtle tree a little further out...