Growing Pentas (Star Cluster) for Butterflies and Hummingbirds

Native to tropical eastern Africa, pentas thrives in heat and low humidity. Perennial where temperatures stay above 30°F; elsewhere grown as an annual to attract butterflies and hummingbirds. Pentas lanceolata produces 4-inch dome-shaped flower heads packed with starry blossoms on multi-stemmed, spreading plants that bloom all summer. Deadheading encourages rebloom.

Light and Watering

Flowers most abundantly in full sun but tolerates some shade. Water when top inch of soil feels dry.

Soil, Fertilizer, and pH

Plant in average, well-drained soil with slightly acidic pH (6.5–6.8). Feed every two weeks with all-purpose or bloom-boosting fertilizer per manufacturer's directions.

Pests and Diseases

If spider mites or aphids appear, spray both leaf sides with insecticidal soap.

Companion Planting

Combine in borders, beds, and containers with other sun-loving annuals like salvia, lantana, and petunia.

For annual planting and care basics, see our guide on growing annuals.