Dahlia

Description

Dahlia is a genus of herbaceous perennial plants that belong to the family Asteraceae. This plant is native to Mexico and Central America and is highly prized for its showy, brightly colored flowers. The Dahlia flower can range in size from 2 inches to more than 10 inches in diameter, and comes in a wide variety of colors such as yellow, red, pink, purple, and white. The plant has a tuberous root system and can grow up to 6 feet tall.

Taxonomic Information

Appearance

Dahlia has large, showy flowers that can come in a variety of shapes, including pompon, cactus, and ball. The petals can be solid colors or have contrasting edges, and some varieties even have striped or speckled patterns. The plant’s leaves are green and toothed, and can grow up to 12 inches long. The plant’s stems are sturdy and upright, and can be green or reddish-brown in color.

Care Guide

Dahlia plants prefer moist, well-drained soil that is rich in organic matter. They need regular watering, but should not be over-watered as this can lead to root rot. Fertilize the plant every 2-3 weeks during the growing season with a balanced fertilizer. The plant prefers full sun, but can tolerate some shade. Dahlia plants are hardy in USDA hardiness zones 8-11.

Common Pests & Diseases

Dahlia plants can be susceptible to a variety of pests and diseases. Some common pests include aphids, spider mites, and thrips. These pests can be controlled with insecticidal soap or neem oil. Some common diseases that can affect Dahlia plants include powdery mildew, verticillium wilt, and bacterial wilt. These diseases can be prevented by practicing good hygiene and avoiding over-watering.

Habitat

Dahlia plants are native to Mexico and Central America, where they grow in sunny, well-drained areas. They have been cultivated for centuries and are now grown all over the world as ornamental plants.

Question and Answer

Q: What is the best time of year to plant Dahlia?

A: Dahlia should be planted in the spring after the last frost has passed.

Q: How often should I fertilize Dahlia?

A: Dahlia should be fertilized every 2-3 weeks during the growing season.

Q: Can Dahlia grow in shade?

A: While Dahlia prefers full sun, it can tolerate some shade.

Q: How can I control pests on my Dahlia plant?

A: Pests on Dahlia can be controlled with insecticidal soap or neem oil.

Related Plants

• Zinnia
• Sunflower
• Chrysanthemum
• Aster
• Marigold

References

• “Dahlia.” Missouri Botanical Garden. Accessed 29 October 2021. <https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=c732>
• “Dahlia.” Royal Horticultural Society. Accessed 29 October 2021. <https://www.rhs.org.uk/plants/18099/dahlia/details>
• “Dahlia.” University of Vermont Extension. Accessed 29 October 2021. <https://www.uvm.edu/sites/default/files/Dahlia.pdf>