Description of Phlox drummondii Hook. ssp. tharpii
Phlox drummondii Hook. ssp. tharpii, also known as Tharp's phlox, is a species of annual flowering plant in the phlox family native to North America. The plant is named after botanist William P. Tharp who discovered it in Texas back in the 1930s.
Common names
The plant is commonly known as Tall phlox, annual phlox, Drummond's phlox, or Texas pride.
Characteristics
Phlox drummondii Hook. ssp. tharpii grows up to 1 to 2 feet tall and spreads about 1 to 1.5 feet. The plant bears numerous flowers that are 1 inch wide on slender stems. The flowers of Tharp's phlox can be pink, purple, white, or red, and they have five petals that bloom from April to May.
The plant prefers well-drained soil and is heat-tolerant, making it ideal for planting in rock gardens, borders, and containers. The plant is also suitable for naturalizing in meadows and prairies.
Uses
Phlox drummondii Hook. ssp. tharpii is often used for ornamental purposes in gardens and landscaping. The plant attracts pollinators such as bees and butterflies, making it an excellent addition to a pollinator garden. Additionally, the plant has been used in traditional medicine to treat various ailments such as respiratory infections, skin conditions, and intestinal diseases. However, it should be noted that the plant is toxic to humans and pets if ingested.
In summary, Phlox drummondii Hook. ssp. tharpii is a beautiful flowering plant with various uses. The plant's ability to thrive in hot and dry weather and attract pollinators make it an excellent addition to any garden or landscape.
Light Requirements
Phlox drummondii Hook. ssp. tharpii prefers full sunlight for optimal growth. They require at least 6 hours of direct sunlight daily. Without adequate light, the plant may experience stunted growth and produce fewer flowers.
Temperature Requirements
This plant grows best in warm temperatures ranging from 70°F to 85°F (21°C to 29°C). It cannot tolerate frost and prefers temperatures that do not dip below 50°F (10°C) at night. In areas with cooler temperatures, it is best grown as an annual.
Soil Requirements
Phlox drummondii Hook. ssp. tharpii requires well-draining soils rich in organic matter. A slightly acidic to neutral soil pH (6.0 to 7.0) is optimal. The soil must be moist but not wet as the plant cannot tolerate waterlogged soil. It is a good idea to amend the soil with compost or organic matter to improve soil texture and drainage.
Cultivation Methods
Phlox drummondii Hook. ssp. tharpii (Whitehouse) Wherry prefers well-drained soil with partial to full sun. It is best to sow seeds directly in the garden bed after the last frost date. Prepare the soil by removing any debris and mixing in organic material. Sow seeds 1/8 inch deep and keep the soil evenly moist until germination, which usually takes 7-14 days. Thin seedlings to about 6-8 inches apart to allow for proper growth and spacing.
Watering Needs
Phlox drummondii Hook. ssp. tharpii (Whitehouse) Wherry prefers consistent moisture in the soil but is susceptible to root rot if the soil becomes waterlogged. Water plants deeply once a week or when the soil becomes dry to the touch. Using a soaker hose or watering at ground level can help prevent moisture from sitting on the foliage, which can lead to disease.
Fertilization
Phlox drummondii Hook. ssp. tharpii (Whitehouse) Wherry benefits from regular fertilization to promote healthy growth and flowering. Apply a balanced, slow-release fertilizer at planting time and repeat every 6-8 weeks during the growing season. Avoid over-fertilization, as this can lead to excessive foliage growth and reduced flowering.
Pruning
Phlox drummondii Hook. ssp. tharpii (Whitehouse) Wherry does not require extensive pruning, but deadheading spent flowers can promote continued blooming and prevent the plant from self-seeding. Remove any damaged or diseased foliage promptly to prevent the spread of disease. At the end of the growing season, cut back the plants to ground level and dispose of any debris to reduce the risk of overwintering pests and diseases.
Propagation Methods for Phlox drummondii Hook. ssp. tharpii
Phlox drummondii Hook. ssp. tharpii, commonly known as Tharp's phlox, is a beautiful and popular flowering annual plant that is native to Texas. If you are interested in propagating this plant for your garden, there are several methods you can try. The most common propagation methods include seeds, stem cuttings, and division of established plants.
Propagation by Seeds
Propagation by seeds is the most common method for propagating Tharp's phlox. The seeds are small, and it's best to plant them directly in the soil where they will grow. The ideal time to sow seeds is in the spring, after the last frost has passed. You can also sow seeds in the fall for winter growth in mild climates. It takes about two to three weeks for the seeds to germinate.
Propagation by Stem Cuttings
Propagation by stem cuttings is another viable method for propagating Tharp's phlox. The best time to take cuttings is during the summer when the plant is in full growth. Cut a 4 to 6-inch long stem from the parent plant, remove the lower leaves, and dip the cut end in rooting hormone. Plant the cutting in a pot with well-draining soil, and keep it in a warm, humid location with bright, indirect light. It takes about four to six weeks for roots to develop.
Propagation by Division
Propagation by division is the easiest method for propagating Tharp's phlox. You can divide the parent plant in the spring or fall, or when it becomes too big for its current location. Dig up the plant carefully, and cut the roots into sections, making sure that each section has a portion of the stem attached. Replant the sections in well-draining soil, and water well. The divided plant will take some time to recover and reestablish.
Disease and Pest Management for Phlox drummondii Hook. ssp. tharpii
Phlox drummondii Hook. ssp. tharpii, commonly known as Tharp’s phlox, is a hardy plant that is typically easy to grow and maintain. However, like any other plant, it is susceptible to certain diseases and pest infestations that can prove detrimental to its health and growth. Here are some of the common diseases and pests that might affect the plant and suggestions on how to manage them:
Diseases
1. Powdery Mildew: Powdery mildew is a fungal disease that appears as white or grayish patches on the leaves, stems, and flowers of the plant. It can lead to stunted growth, yellowing of the leaves, and premature wilting. The best way to manage powdery mildew is by ensuring proper air circulation and reducing the humidity levels around the plant. Removing the infected plant parts and treating the remaining foliage with a fungicide can also help control the spread of the disease.
2. Root Rot: Root rot is caused by various types of soil-borne fungi that attack the roots of the plant, causing them to become black, mushy, and slimy. This can lead to wilting, yellowing, and eventual death of the plant. To prevent root rot, it is essential to avoid overwatering and ensure proper drainage. Using well-draining soil and a fungicide treatment can also help manage root rot.
Pests
1. Spider Mites: Spider mites are tiny pests that infest the leaves of the plant, causing yellowing, browning, and eventual defoliation. They can be managed by regular inspection of the plant, pruning of infested leaves, and the application of insecticidal soap or neem oil. Introducing natural predators like ladybugs and lacewings can also help control spider mites.
2. Aphids: Aphids are small, soft-bodied insects that feed on the sap of the plant, causing the leaves to curl and distort. They can be managed by spraying the plants with a strong blast of water or the application of insecticidal soap or neem oil. Introducing natural predators like ladybugs, lacewings, and parasitic wasps can also help control aphids.
3. Thrips: Thrips are tiny insects that feed on the sap of the plant, causing silvering or bronzing of the leaves, and formation of deformed flowers. They can be managed by the application of insecticidal soap or neem oil. Introduction of natural predators like lacewings, minute pirate bugs, and predatory mites can also help control thrips.
By following the above recommendations, it is possible to prevent and manage common diseases and pest infestations in Phlox drummondii Hook. ssp. tharpii, ensuring that the plant remains healthy and vibrant.
