Origin and Common Names
Coreopsis exaristata O.Hoffm. is a native plant commonly known as Smooth Tickseed, Tall tickseed, Exaristate Coreopsis, and Spreading Coreopsis. It is found throughout the southeastern United States, including Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, and Tennessee.
Uses
Coreopsis exaristata O.Hoffm. is often grown as an ornamental plant in gardens or naturalized areas due to its attractive yellow and brown flowers that bloom from late spring to mid-summer. The plant is also cultivated for its medicinal properties, as the roots and leaves contain antimicrobial and anti-inflammatory compounds. Additionally, the plant is an important source of nectar and pollen for pollinators, particularly bees and butterflies.
General Appearance
Coreopsis exaristata O.Hoffm. is a herbaceous perennial plant that can grow up to 2–4 feet tall and 1–2 feet wide. The plant has a woody base with multiple stems that are green and slightly hairy, with leaves that are lance-shaped or oblong and up to 6 inches long. The flowers have yellow petals with brown centers and are typically 2–3 inches in diameter. The seeds of the plant are small, dark, and slightly curved.
Light Requirements
The plant Coreopsis exaristata O.Hoffm. requires full sunlight to grow and thrive. It cannot tolerate shaded or partially shaded areas. Thus, it should be grown in a location that receives a minimum of six hours of sunlight per day.
Temperature Requirements
This plant requires warm temperatures to grow and flourish. It thrives in a warm and humid climate, and it is not cold hardy. The ideal temperature range for Coreopsis exaristata is between 70°F and 85°F. Temperatures below 50°F can damage the plant, so it is best to keep it in warmer regions.
Soil Requirements
The soil requirements for Coreopsis exaristata are not too strict. It will grow in almost any well-draining soil, be it loam, sandy, or rocky soil. However, a soil pH between 6.0 and 7.5 is recommended. Furthermore, it is essential to maintain proper soil moisture levels. Overwatering or underwatering can damage the roots and gradually weaken the plant.
Cultivation Methods for Coreopsis Exaristata O.Hoffm.
Coreopsis Exaristata O.Hoffm. is a herbaceous perennial plant that is commonly grown for its bright yellow flowers. The plant is propagated from seeds or cuttings. The best time to propagate this plant is in the spring or early summer. The plant prefers well-drained soil with a pH between 5.5 and 7.5. It requires full sun exposure to thrive.
Watering Needs for Coreopsis Exaristata O.Hoffm.
Coreopsis Exaristata O.Hoffm. requires regular watering to keep the soil moist but not waterlogged. The plant prefers a deep watering once a week rather than frequent light watering. During the dry season or in hot weather, it may require more frequent watering. It is important to avoid getting water on the leaves because this can damage the plant and increase the risk of diseases.
Fertilization of Coreopsis Exaristata O.Hoffm.
Coreopsis Exaristata O.Hoffm. requires regular fertilization to remain healthy. It benefits from a balanced, slow-release fertilizer that is high in nitrogen, phosphorus, and potassium. Fertilizer should be applied once a month during the growing season, from spring to early fall, and discontinued during the winter. Excessive use of fertilizer can result in leggy growth and reduced flowering.
Pruning of Coreopsis Exaristata O.Hoffm.
Coreopsis Exaristata O.Hoffm. requires minimal pruning. After each flowering, it is best to trim the plant back by removing the spent flower stems. This will encourage the plant to produce more flowers and improve its overall appearance. In the fall, the plant can be cut back to the ground to prepare it for winter dormancy. Dead or damaged leaves can be removed throughout the growing season to improve the plant's aesthetic appeal.
Propagation of Coreopsis exaristata O.Hoffm.
Coreopsis exaristata O.Hoffm., commonly known as tickseed, is a perennial plant that produces yellow flower heads in the summer and fall. Propagation of this plant can be done through various methods, including division, seed sowing, and cuttings.
Division
Dividing an established Coreopsis exaristata plant is one of the easiest and quickest ways to propagate it. It is best done in the spring or fall when the plant is not in its active growth phase. Dig up the plant and gently separate the root ball into smaller sections, making sure each section has some roots and foliage. Replant the new sections at the same depth as the original plant and water well.
Seed sowing
Seed sowing is another way to propagate Coreopsis exaristata. Collect the seeds once the flower heads have turned brown and dry. Sow the seeds in a seed tray filled with a well-draining soil mix and cover with a thin layer of soil. Water lightly and keep the soil moist. Transfer the seedlings to individual containers once they have grown a few inches tall and the roots start to come out of the drainage holes.
Cuttings
Coreopsis exaristata can also be propagated through cuttings. Take softwood cuttings during the spring or summer, when the plant is actively growing. Cut a 4 to 6-inch section of the stem, making sure it has a few leaves and nodes. Remove the lower leaves and dip the cut end in rooting hormone powder. Plant the cutting in a pot filled with a well-draining soil mix and water well. Keep the soil moist and place the pot in a bright, filtered light. Once your cutting has developed roots, it can be transferred to a larger pot or planted in the ground.
Disease and Pest Management for Coreopsis Exaristata
Coreopsis exaristata O.Hoffm., commonly known as Tall Tickseed, is a beautiful perennial native to the US that produces stunning yellow flowers. The plant is relatively easy to grow and requires minimal attention. However, like all plants, it is susceptible to pests and diseases that can affect its growth and appearance. Here are some common pests and diseases that can affect Coreopsis exaristata and how to manage them.
Pests
Aphids: Aphids are a common pest that can infest Coreopsis exaristata. They are small, soft-bodied insects that suck the sap from the plant's leaves and stems. The leaves of infested plants may deform or turn yellow. To manage an aphid infestation, try using insecticidal soap or neem oil. You can also use a strong stream of water to knock the aphids off the plant.
Spider Mites: Spider mites are another pest that can affect Coreopsis exaristata. These tiny arachnids feed on the leaves of the plant and can cause them to turn yellow or brown. To manage a spider mite infestation, try using insecticidal soap or neem oil. You can also increase the humidity around the plant to discourage spider mites.
Slugs and Snails: Slugs and snails are attracted to the moist environment around Coreopsis exaristata. They can eat the leaves of the plant, leaving large holes. To manage a slug or snail infestation, try using diatomaceous earth as a barrier around the plant. You can also set up beer traps to lure and kill the pests.
Diseases
Powdery Mildew: Powdery mildew is a fungal disease that can affect Coreopsis exaristata. It appears as a white, powdery substance on the leaves of the plant and can cause them to turn yellow or brown. To manage powdery mildew, try removing infected leaves and increasing air circulation around the plant. You can also use a fungicide on the plant.
Crown and Root Rot: Crown and root rot is a fungal disease that can be fatal to Coreopsis exaristata. It is caused by overwatering and poor drainage. Infected plants may wilt and the roots may turn brown or black. To manage crown and root rot, make sure the plant is growing in well-draining soil. Reduce watering and remove any infected parts of the plant.
Leaf Spot: Leaf spot is a fungal disease that can cause brown or black spots on the leaves of Coreopsis exaristata. To manage leaf spot, remove infected leaves and avoid getting water on the leaves of the plant. You can also use a fungicide to treat the plant.
By being vigilant and monitoring your Coreopsis exaristata for pests and diseases, you can ensure it remains healthy and beautiful year after year. With proper management, this stunning perennial can thrive in your garden and bring joy to all who see it.
