Magenta four o'clocks blooming in a garden. The common name of four o'clocks was given to Mirabilis jalapa because the flowers of this plant do not open until late in the day. ... The shrub-like plants have medium green foliage. The shrub-like, erect and spreading, multi-branched plants grow 2-3 feet tall and wide.

Do 4 O clocks spread?

This plant gets its common name because its blooms open in the late afternoon, or around 4 p.m. They stay open until the next morning. ... Four o'clock plants grow and spread quickly under optimal conditions.

Are 4 Oclocks invasive?

Four-o'clocks are not considered serious exotic pests, are not known to invade natural areas and are options for gardeners interested in colorful, fragrant flowers that attract pollinators. DNR does not promote the use of non-native plants in natural areas, or exotics considered aggressively invasive.)