- Species and varieties: Pentas lanceolata, commonly known as Egyptian Star Cluster, is the most popular species. Varieties include 'Butterfly Deep Rose', 'Graffiti Red Lace', and 'New Look Red'.
- Hybrid or heirloom: Pentas flower seeds are available in both hybrid and heirloom varieties. Hybrids are often bred for improved disease resistance and vibrant colors, while heirloom varieties are valued for their historical significance and genetic purity.
- Pruning and training: Regular deadheading of spent flowers encourages continuous blooming. Pruning can be done to maintain the desired shape and size of the plant. Pinching back the stems can promote bushier growth.
- Fertilization needs: Pentas flowers benefit from regular fertilization. Use a balanced, water-soluble fertilizer every 4-6 weeks during the growing season. Avoid over-fertilizing, as it can lead to excessive foliage growth at the expense of flowers.
- Hardiness zones: Pentas flowers are suitable for USDA hardiness zones 10-11. They can be grown as annuals in cooler zones.
- Climate requirements: Pentas flowers thrive in warm, tropical, and subtropical climates. They require full sun to partial shade and well-drained soil. They are heat-tolerant and can withstand high temperatures.