Dahlia Plant Care

Dahlia (Dahlia pinnata) belongs to the Asteraceae family within the Dahlia genus. Dahlia is also known as Dahlia arborea, Dahlia cervantesii, Dahlia × cultorum.

Dahlia displays an upright, bushy perennial growth habit, reaching up to 3 inches tall with a spread of approximately 2 inches. Dahlia produces large, showy blooms in various colors.

Leaf size: approximately 6 inches.

Dahlia pinnata requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

Dahlia thrives in full sun to partial shade light conditions. The optimal light range is 2000–6000 lux. Avoid placing Dahlia in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Dahlia pinnata grows best at temperatures between 60°F and 75°F. Dahlia prefers humidity levels of 40–60%.

Well-draining, fertile soil with added compost or organic matter. Good drainage is essential for Dahlia to prevent waterlogging, which leads to root rot and fungal issues.

Divide and repot tubers every spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

Dahlia can be propagated through division of tubers, stem cuttings. Similar propagation techniques also apply to tree dahlia plant care, which shares the same genus.

Dahlia is susceptible to aphids, spider mites, slugs. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Dahlia grows outdoors in USDA Zone 13a. In cooler regions, grow Dahlia as a houseplant or bring it indoors before the first frost.