Flowers of plants in this genus are produced in umbrel-like clusters with numerous small flower groups to 1 inch wide. The flowers are followed by green fruits that ripen to yellowish-brown and split open to reveal their seedy contents. The leaves are simple, narrow lance-shaped, or ovate.
CareGrow in fertile, well-drained soil in full sun. Some species like more water.
PropagationSow tender seeds at 61° to 64°F in later winter. Sow hardy seeds in a cold frame in early spring. Divide plants or take basal cuttings in spring.
ProblemsUnder glass, watch for whiteflies and spider mites. Aphids and mealybugs can be a problem when flowering. In the southeast, rust and leaf spot are common.