Agathaea elongata Plant Care

Agathaea elongata (Cineraria hirta) belongs to the Asteraceae family within the Cineraria genus. Agathaea elongata is native to western Canada, western United States, and northwestern Mexico, primarily in British Columbia, Washington, Oregon, California, and Baja California, with a few populations in Nevada and Idaho. Agathaea elongata is also known as Agathaea tricolor, Aster elongatus, Aster tricolor.

Agathaea elongata displays a compact, bushy perennial growth habit, reaching up to 1.5 ft tall with a spread of approximately 1.5 ft. Agathaea elongata produces colorful daisy-like flowers in shades of blue, purple, pink, or white.

Leaf size: approximately 4 inches.

Cineraria hirta 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.

Agathaea elongata thrives in bright indirect light. Avoid placing Agathaea elongata in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Cineraria hirta grows best at temperatures of 60–75°F. Agathaea elongata prefers humidity levels of 40–60%.

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

Feed Agathaea elongata every 4 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.

Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Repot annually in spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

Agathaea elongata can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to dusty cineraria plant care, which shares the same genus.

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

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Agathaea elongata grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Agathaea elongata is native to western Canada, western United States, and northwestern Mexico, primarily in British Columbia, Washington, Oregon, California, and Baja California, with a few populations in Nevada and Idaho. In cooler regions, grow Agathaea elongata as a houseplant or bring it indoors before the first frost.