Specimen Spotlight: Early-bird Floral Interest Courtesy of the Dogwood Family

By Melinda Heigel, EMGV

If you are from North Carolina, you are quite familiar with the flowering dogwood (Cornus florida), our official state “flower.”1 Flowering dogwood has a broad range and is native to southeastern Canada, eastern North America and eastern Mexico. The pink- to-white color show that lights up the landscape usually beginning in March is a sure sign that spring is finally in the air. But there are other members of the dogwood family (the Cornaceae family) that are worth knowing too. Among others, the cornelian cherry dogwood (Cornus mas) offers spectacular color in compact a slow-growing shrub to small tree, and its bloom time can add some much-needed interest early in the year when many flowering trees and shrubs are still dormant.

Multi-Season Interest

Many gardeners struggle with four-season interest in their landscape. After warm-season blooms fade, the garden can seem quite bare until springtime. With the deciduous Cornus mas, the small-but-stunning golden 3/4″ round clusters (umbels)2 appear upon bare branches in late winter to early spring, which lends an architectural quality as well as shot of color to an often drab vista. Depending on conditions, gardeners can generally count on about a month-long bloom time. But wait–the cornelian cherry dogwood has more to offer throughout the year as well. Like our native dogwood, this specimen produces red cherry-like drupes in the mid summer to late fall that are attractive to both the gardener’s eye and wildlife alike. Some newer cultivars produce white, yellow, or purple drupes, so do your research first if you want bright red fruits. The plant’s glossy 4″ leaves are not known for producing outstanding fall color but typically turn a mix of yellow, dark green, and dark purple. But in the late fall and early winter, the plant’s exfoliating rough bark offers excellent texture. Note that the intriguing shaggy bark appears once the plant has matured. If a plant can offer near-year-round interest, the cornelian cherry dogwood should be on the list.

Description and Growing Conditions

The cornelian cherry dogwood is best used as a hedge, foundation plant, in a shrub border, or even trained into small tree where it can function as a garden accent. Tree form of this deciduous plant is the best way to highlight its bark. When mature, this dogwood can read 15-20 ‘ in height and width and exhibits a rounded, dense and upright branching habit. It is a slow to moderate grower, but gardeners should remove suckers to control growth and habit.

The plant performs best in full sun to part shade and is happiest in well-drained rich soil. It can tolerate a wide soil pH range from 5.0 – 8.0. The cornelian cherry dogwood has a reputation for being easy plant to grow with low maintenance. This native of western Asia and southern Europe is winter resilient and hardy in zones 4-8. While it can be susceptible to pests and pathogens when under stress like all plants, this specimen has very few insect or disease problems; it shows resistance to dogwood anthracnose, powdery mildew, and dogwood borers, the later of which can be a problem for our native flowering dogwood.

There are several cultivars of cornelian cherry dogwoods. ‘Spring Glow’ and ‘Spring Sun’ (also known as Spring Grove’) are two cultivars that exhibit characteristics mentioned above. Horticultural experts often suggest ‘Spring Glow’ specifically as a good selection for the South. Cornelian cherry dogwood can be planted in succession with other native and non-native dogwoods in the landscape to extend bloom time.3

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Notes

1–With our native Cornus florida, the term flowering dogwood “flower” is a bit of a misnomer. What people typically think of as flowers are actually modified leaves known as bracts which are colorful and grow at the base of small flowers. Flowering dogwoods and poinsettias are good examples of plants with colorful bracts.

Black and white diagram of dogwood  bloom with four petals.

(Image credit: IFAS Extension, University of Florida)

2–Umbels are flowers that form a flattened dome-shape and grow from a common point on a stem. In addition to the cornelian cherry dogwood, examples of umbels are Queen Anne’s lace (Daucus carota) and Chinese paperbush (Edgeworthia chrysantha).

3–Chinese cornelian dogwood (Cornus officinalis) is nearly indistinguishable from the cornelian cherry dogwood (Cornus Mas) and blooms slightly earlier in the season. Pairing these two dogwoods in your landscape will only help extend the blooming season. See North Carolina State University’s Plant Toolbox site for more information at https://plants.ces.ncsu.edu/plants/cornus-officinalis/.

Resources and Additional Information

North Carolina State University offers an excellent in-depth look at the cornelian cherry dogwood on their Plant Toolbox site including an extensive list of cultivars and varieties and their characteristics. This site also features a video highlighting the plant created by Andy Pulte for “Landscape Plant Identification, Taxonomy and Morphology” a plant identification course offered by the Department of Plant Sciences, University of Tennessee.

https://plants.ces.ncsu.edu/plants/cornus-mas/

Want more information on a wide array of ornamental dogwoods, including cornelian cherry dogwood? See Clemson University’s factsheet below.


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January To Do in the Garden

By Gary Crispell, EMGV

Camellia flower white with pink-edged petals surrounded by green leaves.
Camellia japonica offers one of the first flowers of the new year. (Image credit: NC Cooperative Extension)

We made it!! 2023 is here and so is this writer thanks in large part to the support of family, good friends, just plain stubbornness and healthy (?) doses of Coffea arabica, dark roast. Horticulturally speaking, 2022 was a bit of a disappointment at this house. The tomatoes, despite efforts to the contrary, fell victims to the cursed voles again. They are not the least bit intimidated by chicken wire buried under the garden soil. It has to be hardware cloth. The Accidental Cottage Garden (ACG) didn’t fare well in the prolonged dry spells that comprised summer 2022. The plants that did survive with only minimal applications of expensive water included annuals Zinnia sps., gallardia (Gallardia pulchella), marigolds (Tagetes sps.), cosmos (Cosmos bipinnata) and sunflowers (Helianthus sps.). Perennials that didn’t succumb included purple cone flower (Echinacea purpurea), butterfly weed (Asclepias tuberosa), various daylilies (Hemerocallis sps.), balloon flower (Platycodon grandiflorus) and iris varieties. One of my favorites, corn flower/bachelor buttons (Centurea montana) isn’t at all drought tolerant. And I really love that blue. So sad.

(Left to right) Reliving the beauty of the AGC in bloom in 2022 and celebrating the drought-tolerant balloon flower (Platycodon grandiflorus), marigolds (Tagetes sp.), and blanket flowers (Gallardia pulchella). Taking photos of your garden throughout the season allows you to revisit them during the long days of winter and remember what plants were top performers in the garden. (Image credit: Gary Crispell)

We have ordered (You haven’t ordered seeds yet?!?) some interesting Helianthus varieties and a Southeastern pollinator mix. Que sera, sera. You know I’ll keep you posted. So, by now some you have despaired of seeing a calendar here due to the loquaciousness of this writer. For those of you who have persevered there are things to do in January other than sit by the fire with a warm beverage and a good gardening book watching it snow no more than what God will melt in a day. What?! That’s the perfect amount of snow. You watch it come down and turn the world white. Then you can enjoy it for awhile knowing that by noon tomorrow it will all be gone with no further effort on your part. It don’t get no better ‘n that, friends. Ok, ok! Here’s your calendar. Sheeesh.

LAWN CARE

If you haven’t already cleared the lawn of leaves, exactly what are you waiting for? There won’t be anymore leaves falling until the oaks shed their bottom leaves in the spring. Just do it, already. Take a really good look at the grass area of your yard and see if there is the possibility of eliminating some (all?) of the grass. Less lawn equals less expense and greater sustainability. Think about it. It’s your planet, too.

FERTILIZING

Nope. Nothing to see here folks.

PLANTING

Maybe some asparagus crowns, but that’s about it for January. I take that back. I have successfully transplanted trees from the nursery in January. Just remember if it turns dry, they need water even if they don’t have any foliage.

PRUNING

Image of a person's hand holding pair of garden pruners with red handles actively pruning a juniper bush.
Bypass pruners are one of the most popular tools for pruning and if maintained properly allow for accurate and clean cuts. (Image credit: NC Cooperative Extension)

This is it. Your best reason to go play in the yard in January. Trees and shrubs especially are less traumatized by January pruning. The wounds heal faster from January infliction than in other months. Also, unless you have an actual hedge please resist the temptation to use the hedge trimmer. Shearing is best left to the English, French or Japanese formal gardens. Hand pruning individual branches will produce healthier and more esthetically pleasing plants.

SPRAYING

So, the plants you brought in off the deck for the winter had “friends” on them and now they are somewhat bothersome? It happens. If possible, take them back out on a nice day and spray them with a horticultural oil or insecticidal soap. Let them dry then bring them back inside. If you have to spray them inside just be careful. Wipe up any overspray. ALWAYS READ THE LABEL.

Photo of underside of the leaves of an azalea plant--green leaves--with stippling and brown spots.
Lace bugs and tell-tale damage on an azalea in January. (Image credit: J.R. Baker)

If you have azaleas planted in a sunny location you probably have azalea lace bugs. They will be actively feeding whenever it is much above 40 degrees. Spray them with a horticultural oil and be done with them (at least until hot weather).

WHAT TO DO WHEN JANUARY IS TOO INHOSPITABLE TO PLAY OUTSIDE

Three words: seed catalogs, Google.1

Think about places in the garden where you might experiment with plants you haven’t tried before. Research the plant’s appropriateness for the space. “Right Plant, Right Place” isn’t just a catchy phrase. Especially think about natives. Is the sunniest part of your yard right out front? Stick some tomatoes in with the petunias and marigolds, peppers in the perennial bed. It’ll give the neighbors something to talk about until you start sharing the tomatoes. If you have an HOA, my condolences.

Stay warm, y’all. March is closer than you imagine.

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Notes

1–We strive to provide you with quality research-based information. There are a few tips you can employ to tailor your internet searches ensuring you are receiving scientific data. One is to type in the subject you are searching for and NCSU (Soil Test+NCSU). Other ways are to include “site:edu” in your search (“soil test” “site:edu”) or “extension” (“soil test” “extension”) These methods of searching can help lead you to research institutions and cooperative extension sites that provide sound advice for your gardening concerns.

Resources and Additional Information

For tips on general pruning techniques and detailed instructions on bloom time, pruning timing and type of pruning for specific plants, visit North Carolina State’s sites below.

https://content.ces.ncsu.edu/general-pruning-techniques

https://content.ces.ncsu.edu/how-to-prune-specific-plants

Want more information on caring for azaleas through lace bug control? The following NC Cooperative Extension site is a great resource.

https://content.ces.ncsu.edu/azalea-lace-bug

To learn more about how to achieve “right plant, right place” in your landscape, check out University of Florida Extension and Clemson University’s Home and Garden Information Center’s resources as you make your 2023 garden plans

https://edis.ifas.ufl.edu/publication/EP416

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