Are you thinking of growing some type of Daphne shrub? Learn why two of the Burkwood cultivars (Carol Mackie and Briggs Moonlight) could be excellent choices for your yard. The genus also boasts an interesting cultural connection, but with a surprising twist.
Taxonomy and Botany of Daphne Shrubs
Plant taxonomy classifies the daphne plants discussed in this article as Daphne x burkwoodii Carol Mackie. The genus name thus doubles as the common name for the plant. Carol Mackie is the cultivar name. Burkwood daphne shrubs are the result of a cross; the parents of this hybrid are Daphne cneorum (indigenous to Europe) and Daphne caucasica, a Caucasus native. These plants are deciduous or semi-evergreen (depending on your climate), broad-leaf, flowering shrubs.
Warnings About Growing Daphne Shrubs
These are poisonous plants. Both the berries and leaves are listed as toxic in a number of sources and therefore should not be eaten. They may also irritate the skin. Moreover, daphnes are not the easiest of shrubs to grow. They do not transplant well, and the grower is required to maintain a delicate balance between keeping the soil moist and keeping it well-drained.
Features of Daphne Shrubs
Carol Mackie plants are compact, rounded shrubs that mature to about 3 feet tall, with a slightly greater spread. They bear fragrant, white to light pink, tubular flowers in clusters. and their blooming time is generally in early May.
The flowers are followed by small red berries (drupes) if pollination occurs. Perhaps the outstanding feature of Carol Mackie plants is their variegated foliage.
Despite being classified as deciduous, you can understand why some refer to Carol Mackie as "semi-evergreen": The daphne shrubs in a zone 5 garden will usually keep their leaves throughout the winter; the leaves do not become unattractive until late winter.
Caring for Daphne Plants
These daphne shrubs can be grown in USDA planting zones 4 to 8.
Grow Carol Mackie shrubs in a well-drained soil with plenty of compost and a neutral to acidic soil pH. Partial sun to partial shade is usually the recommended growing location for these plants. At the partial-sun end of this spectrum, you may experience superior blooming.
But many people seeking shrubs for shade will gladly sacrifice some flowers in order to enjoy the bicolored leaves of these bushes. Group them together with other acid-loving plants that have similar sunlight needs.
Daphne shrubs prefer moist soil. To keep the soil around them moist in summer (and to keep the roots cool), apply a 3-inch layer of mulch.
Uses for Daphne Shrubs
With their variegated foliage, they are attractive enough to stand alone as specimens. But these shrubs that bloom in early spring can also be grouped together in foundation plantings or hedges. Their need for excellent drainage makes them good candidates for large rock gardens.
Other Sweet-Smelling Daphnes
In the same genus and also commonly grown is D. odora, whose very species name tells you how fragrant it is. It blooms earlier than the plant under discussion here, but it is also less cold-hardy (zones 7 to 9).
Another Burkwood hybrid with variegated leaves and sweet-smelling flowers is Briggs Moonlight. Grow it in zones 5 to 9. The coloration of Briggs Moonlight's foliage is superior to Carol Mackie's, as the brighter of the two colors is more predominant. In other respects it is very similar to Carol Mackie.