There are dozens of cultivars of the dianthus group (Dianthus spp.) including sweet William, carnations, and pinks. According to North Carolina State University Cooperative Extension, they are typically grown in U.S. Department of Agriculture zones 4 to 9. Depending on the cultivar and whether it is cultivated as an annual, perennial, or biennial, dianthus can take anywhere from one to two years to bloom when grown from seed.
Tip
The dianthus plant may begin to bloom three to four months after you plant the seeds, depending on the cultivar. It won’t bloom after being planted in the fall; it will do so the following spring or summer.
Do Dianthus grow quickly?
The most widespread varieties are rock or alpine pinks. They grow as mats of little pink, white, or purple flowers suspended above the foliage, together with spear-shaped or grass-like leaves. Dianthus deltoides, often known as maiden pink, is utilized as a ground cover or on banks. If the wasted flowers are taken out, it blooms in the summer and fall. Individual plants will quickly spread to produce a mat that is about a foot in diameter. Another common rock pink, called cheddar pink (Dianthus gratianopolitanus), grows in a mat that is just 4 to 6 inches tall. Rock pinks thrive in soil that drains quickly, is alkaline, and has little organic matter.
Dianthus: Does it bloom the first year?
The more popular Dianthus species bloom the first year after being planted as seeds. Some plants, like sweet William, won’t grow unless they receive a head start by being sown indoors over the winter. If the seed is put indoors in the late winter, anticipate sweet William to bloom in the spring and summer and carnations to bloom in the spring.
Expect your first flowers three to four months after you sow the seed, though the length of time it takes for each species to bloom varies.
Be advised that only a few varieties of Diathus plumarius, such “Sweetness (Dianthus plumarius “Sweetness”), bloom from seed the first year. By planting the seeds in February, you can expect to get fragrant blossoms by May.
How long does it take Dianthus to mature from a seed?
Dianthus can be produced from seed that is sown early indoors and moved outside after a frost, from seeds that are placed in the garden directly in the summer, or from plants that are cultivated in pots.
Indoor Seed Sowing
- 8 weeks before the last spring frost, start indoor seeds.
- Cover just barely with seed-starting mixture.
- At 60 to 70 degrees F, keep the soil moist.
- Seedlings appear after 14–21 days.
- As soon as seedlings appear, give them lots of light on a sunny windowsill or grow them 3–4 inches beneath 16–hour-per-day fluorescent plant lights that are off for eight hours at night. As the plants get taller, turn up the lights. Because they will become too hot, incandescent bulbs will not function in this process. Do not leave lights on continuously for 24 hours; most plants need a time of darkness to flourish.
- Seedlings don’t require a lot of fertilizer; feed them when they are 3–4 weeks old with a starter solution (half the strength of an indoor plant food), as directed by the manufacturer.
- Seedling plants must be “hardened off” before being planted in the garden. By relocating young plants to a protected area outside for a week, you can acclimate them to outside circumstances. At first, be sure to shield them from the wind and the light. If frost is expected at night, cover or bring pots inside; then, in the morning, reintroduce them to the outdoors. The plant’s cell structure is toughened during the hardening off process, which also lessens transplant shock and scorching.
How to Plant Potted Plants:
- Select a site with loose, well-drained soil that receives direct sunlight.
- Turn the dirt under to a depth of 6 to 12 inches, remove any debris, and lightly rake the soil as level as you can to prepare the bed.
- All gardens benefit from the addition of organic matter (leaf mold, compost, well-rotted manure), which is crucial in recently developed communities.
- To lessen transplant shock, plant during gloomy weather or in the late afternoon.
- For each plant, create a hole that is sufficiently large to hold the root ball.
- To promote healthy root growth, unpot the plant and use your hands to gently release the root ball.
- Set the top of the root ball so that it is level with the dirt around it. Up to the top of the root ball, cover with soil. With your hand, forcefully press the earth.
- To save water and prevent weeds, thoroughly moisten the soil and sprinkle a thin layer of mulch (no thicker than two inches) on top.
Direct Sowing in the Garden
- After the last spring frost threat has passed or in the late summer, 12 weeks before the ground freezes, sow outdoors in a sunny region with well-drained soil.
- Take out the weeds and smooth and level the top 6 to 8 inches of soil after working in organic matter.
- Thinly and evenly scatter the seeds, then lightly cover with fine soil.
- Keep wet all throughout.
- In 14 to 21 days, seedlings will appear.
- When seedlings have three sets of leaves, thin to 12 inches apart.
How to Grow
- Keep weeds under control while the plants are growing. In order to suppress weeds, either cultivate frequently or apply a mulch to stop their germination. Weeds compete with plants for water, space, and nutrients.
- Mulches also support stable soil temperatures and moisture retention. When used as a mulch for perennial plants, weathered bark or finely chopped leaves give the bed a more natural appearance and, as they decompose over time, enrich the soil. Mulches should never be placed on a plant’s stems to avoid potential decay.
- Perennials need to be watered carefully to get them started. To encourage young roots to swell deeply, water thoroughly at least once each week. One inch or so below the soil’s surface, the soil should be wet. By placing your finger in the ground, you can verify this. Water in the early morning hours so that all of the leaves have time to dry. The majority of perennial plants need an inch of rain or weekly irrigation. Using a rain gauge, you can determine whether you need to add water.
- Some protection from strong winds and intense sunlight may be required until plants grow established. Additionally essential is good airflow.
- A mild fertilizer can be administered after new growth starts to show. To prevent burn damage, keep granular fertilizers away from the plant’s top and leaves. Use moderate amounts of a slow-release fertilizer because greater amounts could promote root rots.
- Deadheading will keep the plants looking tidy and promote more continuous blooms.
- After the ground freezes, some plants, like the limbs of a Christmas tree, may benefit from a winter mulch. Before new growth forms, remove in the spring.
Common Disease Problems
Alternaria Leaf Spot: On the upper surface of the leaves and along the midrib, small, rounded, reddish-brown dots with white to gray centers appear. The lesions could surround the stems and result in wilt. Warm, rainy, or extremely humid conditions makes this sickness worse. Avoid getting water on the foliage, advises Burpee. Avoid working with moist plants and remove any contaminated plant components. Make sure there is lots of air movement. For advice on fungicides, get in touch with local cooperative extension service.
Bacterial Slow Wilt or Stunt: This results in the lower leaves wilting, twisting, curling, and stunting before dying. Plants that are stunted have slender, yellow-green leaves. Burpee advises getting rid of diseased plants.
Botrytis: This fungus turns flowers, leaves, stalks, and buds a greyish color. It thrives in chilly, rainy weather. Burpee advises removing the afflicted plant sections, avoiding watering at night and watering the plant directly, and ensuring that plants have adequate air circulation. For advice on fungicides, get in touch with local cooperative extension service.
Downy Mildew is a fungus that eventually affects both sides of the leaves, causing pale gray areas on their undersides. Burpee Rotate crops with plants from a different family, according to advice. Avoid watering from above. Don’t overcrowd plants and make sure there is enough air movement. When plants are damp, stay away from them.
When the weather is humid, a fungus illness known as powdery mildew develops on the tops of the leaves. The surface of the leaves seems to be white or grayish, and they may curl. Burpee advises giving the plants adequate air circulation through optimum spacing and pruning in order to prevent powdery mildew. For advice on fungicides, get in touch with local cooperative extension service.
Common Pest and Cultural Problems
Aphids: These disease-transmitting sucking insects that feed on the undersides of leaves might be green, red, black, or peach in appearance. On the foliage, they deposit a sticky substance that draws ants. Burpee advises attracting or introducing aphid-eating predators like lady beetles and wasps into your garden. You can also use an insecticidal soap or a powerful spray to wash them away.
Cabbage Looper: These worms are 1-1.5 inches long, green with a white stripe on either side. Burpee advises choosing by hand. Row coverings that float can assist stop them from laying eggs on the plants.
Cyclamen mite: By suckling juice from leaves and stems, these mites harm plants. They proliferate quickly in hot, dry conditions. They are only seen with the aid of a magnifying glass. Plants may not blossom and will appear stunted and deformed. Flowers will have streaks, blotches, and distortions. The leaves may cup, curve, get smaller and thicker. Burpee’s Advice Infested plants should be thrown away. Don’t work with plants that are infected. In dry conditions, keep plants well-watered. For advice on insecticides for severe infestations, contact local cooperative extension service.
Spider mites: These minuscule insects, which resemble spiders, are approximately the size of a peppercorn. They can be yellow, brown, black, red, or black. They ingest plant liquids, sucking out chlorophyll and injecting poisons that leave the foliage with white spots. On the plant, webbing is frequently seen. They cause the leaf to stipple, dry, and become yellow. They proliferate swiftly and do best in dry environments. Burpee’s Advice Every other day, a strong spray can help control spider mites. Try using insecticidal soap or hot pepper wax. For advice on miticides, contact your local Cooperative Extension Service.
Thrips: Thrips are little, straw- or black-colored, needle-like insects. They attack flower petals, leaves, and stems while sucking plant liquids. The leaf surface of the plant will show stippling, discolored flecking, or silvering. Numerous illnesses can be transported from plant to plant by thrips. Burpee advises placing sheets of aluminum foil between plant rows to deter many thrips. After the first frost, remove all weeds from the bed and any debris. For information on pest control, contact your cooperative extension service.
FAQ
What distinguishes a carnation from a dianthus? A frequent name for a variety of dianthus is the carnation. They are also known as “pinks” because to the petals’ notched edges, which resemble pinking shears.
How can I ensure that my dianthus blooms continuously? You may extend the blooming period of your dianthus by regularly deadheading it.
How come my dianthus isn’t blooming? Dianthus does not often need a lot of fertilizer and only requires full sun and well-drained soil. Make sure your plants are in good locations, and avoid overwatering and overfertilizing.
Does the dianthus grow back?
The use of special scissors with saw-toothed blades is necessary because woven fabric will tear when cut. Fraying is prevented by the zigzag cut, which restricts the length of each thread.
These “pinking scissors” were given their name after the pink plant in the genus Dianthus, not the color pink. In fact, the ragged edges of the Dianthus petals resemble those of pinking shears.
Similar to how lilacs can be white or deep red, but have come to be associated with a light purple hue, the pale red hue recognized as pink may have originated from one of the garden pinks’ most well-known hues.
Carnations (Dianthus caryophyllus) and Sweet William are examples of perennials that belong to the Garden Pinks or Dianthus genus (Dianthus barbatus). Though some carnations can grow up to three feet tall, the majority only reach heights of 10 to 20 inches.
Pinks (Dianthus plumarius) grow quickly and may withstand deer. The colorful, fragrant blossoms make wonderful cut flowers and come in a variety of hues. Start Pinks (Dianthus) seeds inside six to eight weeks before your last frost for the earliest flowers. They normally bloom the first year after being started indoors.
Once the earth has warmed up and any chance of a frost has passed, you can also plant Pinks seeds directly in the garden. Pinks won’t likely bloom the first year after being planted directly in the garden. In light, well-drained soil in direct sunlight, plant the seeds one-eighth of an inch deep. Rich soil with a pH of 6.75 that is slightly alkaline is ideal for them. Crushed dolomitic limestone should be added if your soil’s pH is under 7.0. Add wood ashes to your soil to reduce acidity if it is too acidic.
Pinks can also be multiplied by splitting up existing clumps of plants or by taking cuttings.
In the spring or the first part of the summer, take softwood tip cuttings. Apply rooting hormone to the cuttings before planting them in flats or pots. Your plants should be fully rooted and tough enough to set out into the garden by fall if you keep them moist but not soggy.
Pinks that are older clumps can be separated and replanted. Old clumps can be divided to revitalize the existing plants. When they first grow in the early spring, it is simple to divide them. Simply dig the entire clump up, roots and all, and use your hands to carefully pry it apart. Use two gardening forks to cut into the middle of the clump if it is too large or robust, and then slowly peel the plant apart. Each component must have roots and be prepared for fast replanting. Every three to four years, you should divide your Pinks. Once a week is adequate, unless the soil is really dry.
Never bury any portion of the stems or crown, and do not mulch them, as pinks grow from a crown or leaves at the top of the root system.
In order to prolong the blooming season, remove any fading flowers as they pass away. You can let some of the pink flowers go to seed to maximize the number of blooms the next year because they frequently reseed themselves.
Cut the plants back to just an inch or two above the earth after your first deadly frost in the fall. Pink flowers thrive in pots, at the front of mixed borders, as a cutting garden, and as a component of cottage gardens.
Use the nutmeg-scented blooms in salads, as cake decorations, or soaked in wine and dusted with sugar. The French liqueur Chartreuse contains several unidentified components, including pinks.
Pink is a flower, a hue, and a mood, so much so that Tea Set, a band that went by that name before changing, would later sell over 250 million records and have an effect on David Bowie, Queen, Phish, Radiohead, and Yes.
In order to create Pink Floyd, they blended the names of the blues musicians Pink Anderson and Floyd Council. And that gave music-loving gardeners the warm fuzzies.