Calluna is a plant genus comprising just one species, namely Calluna vulgaris. This perennial shrub is native to Europe and Asia. It is known by several names including Scotch heather and spring torch, both of which are indicative of its intense spring colors. The foliage consists of scale-like, mid-green leaves that prop up pink flower spikes, which reach a height of 3 feet. This evergreen ground cover spreads a similar width, making it an ideal foundation plant, especially in rock gardens.
There are several things to consider when planting and growing the Scotch heather. The condition of the soil, the climate, and certain pests or diseases can affect the health of Calluna vulgaris.
Climate
This shrub thrives in hardiness zones 5 to 7. It prefers full sunlight, rather than partial shade.
Soil Conditions
In order for the Scotch heather to grow healthily, it is recommended to use well-draining soil. Poorly draining soil will lead to root rot, which is a condition that deteriorates the structure and function of the plants root system. The soil should have a high organic content and an acidic pH. It is a good idea to add mulch to protect it from the elements.
Watering and Fertilizers
Water regularly for optimum growth. Avoid over-watering this plant. Too much water will lead to root rot.
Propagation
The best way to propagate this plant is by taking semi-ripe cuttings. It is recommended to root semi-ripe cuttings during the summer. Another option is to sow seeds.
Pests and Diseases
This shrub is not normally prone to insect infestation or disease. During hot summers, an increased number of spider mites may infect this shrub.
Reference:
Calluna vulgaris – UConn Plant Database
Calluna vulgaris – Fine Gardening