Planting and caring:
These plants grow fairly slow and are commonly found as container or bedding plants. Pentas plant care is similar to any warm season perennial. They are not prone to many diseases and the main pest problem is spider mites. Pentas flowers can be used as annuals during summer in climates colder than USDA plant hardiness zone 10. They will simply die back when the cold weather arrives, or you can try to growing Pentas plants indoors.
If you want more of these delightful plants, they are fairly easy to propagate. Pentas plants grow from seed or from softwood cuttings. Take cuttings in spring from terminal wood and dip the ends into a rooting hormone. Push the cut stem into a soilless medium, such as sand, that has been pre-moistened. The cutting will root and produce a new plant within a couple of weeks.
Pentas are low maintenance plants. Provided they get plenty of water, sunshine and heat, they will perform beautifully and reward you with an abundance of blooms. Deadhead Pentas flowers to encourage more blooms. Young Pentas plant care should include pinching off the stem ends to force a more compact plant. Fertilize in spring with a slow release granular fertilizer.
Mulch around in-ground plants to conserve water and repel weeds. Save outdoor plants in winter by digging them up and putting them in a container with a good potting soil. Bring them indoors to a warm room with bright light and no drafts. Reintroduce the plant gradually to the outdoors in spring as soon as ambient temperatures are 65 F. (18 C.)