Definition of doom. 1  1 : a law or ordinance especially in Anglo-Saxon England. 2  2a : judgment, decision; especially : a judicial condemnation or sentenceb (1) : judgment 5a (2) : judgment day 1. 3  3a : destiny; especially : unhappy destinyb : death, ruin.
In its native range Exacum affine is an annual or short-lived perennial and is suitable for permanent outdoor cultivation only in humid tropical and subtropical areas. Grown as a pot plant, this plant requires a well-drained, but moist potting mix. Exacum will tolerate good light but not direct sun.
Winter Care. Container-grown osteospermum plants brought indoors during winter may perform as perennials. In most cases, however, gardeners treat the plants as annuals, allowing them to die back when temperatures drop and replant from seed the following spring.ative to South Africa, the plant tolerates heat but slows down in extremely hot or humid conditions. Osteospermum blooms in summer through fall, and is perfect for natural gardens throughout the United States. Commonly grown as an annual, the plant may perform as a perennial in USDA hardiness zones 9 through 11.