Dianthus in the Urban Garden
By: Susan Walsh
The Dianthus, more commonly known as Carnations, Sweet William, or Pinks, is a beloved cut flower. With over 300 species, their fresh scent and long lasting durability make them a favorite of florists. They are often found in flower arrangements, and can also be purchased in bunches at grocery stores and nurseries. These plants can also be grown at home in window boxes and planters and add color and interest to the urban garden.
Native to parts of Europe and Asia, they are considered herbs and are available as annuals or perennials. They grow to between 8-24 inches tall with blue-green strap-like leaves and ruffle edged flowers that come in a variety of colors and patterns. Some varieties grow upright while others have a very attractive cascading growth habit. Dianthus has a long blooming season (spring through fall) and is an evergreen. This gives them visual interest even in the winter.
Care
Dianthus need lots of fresh air so a patio or balcony is a good fit. They like sunny, warm conditions but will not tolerate extremely hot or wet conditions and will show their displeasure with yellow leaves and rapidly wilting flowers. Water regularly but only when soil begins to dry out. Dianthus needs a good, well draining soil or it will quickly succumb to root rot. Remove faded blooms and cut stems to the soil line. Feed every 6-8 weeks.
Propagation
Dianthus can be grown from seeds or cuttings. They can also be divided. Most nurseries carry young plants if a quick start is desired, but to start from seed sow in early spring and transplant outdoors after the danger of frost has passed. If sowed early enough, the plants will bloom later in the year. Cuttings will not bloom until their second year. To divide, remove the clump from its container and carefully pull the roots apart. Division is not only an easy propagation method-it also breathes new life into clumps that were poor flower producers.
Problems
Aphids can sometimes be a problem. Knock them off with a garden hose or spray with insecticidal soap. In overly wet conditions carnation rust can occur. Treat with a fungicide meant for garden plants. It
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