Culture
Top growth winter hardy to USDA Zones 10-11 (roots hardy to Zone 9). In St. Louis, grow as annual bedding plants or in containers that may be overwintered indoors in bright, cool (40-49°F) locations. Container plants can be trained as standards. Easily grown as bedding plants in average, medium moisture, well-drained soils in full sun. Tolerates poor soils. Since plants for bedding are relatively inexpensive, most gardeners purchase new plants each spring rather than trying to overwinter ones from the current year. Cultivars generally do not come true from seed, however, cuttings may be taken in summer from favorite plants for overwintering.
Noteworthy Characteristics
Lantana camara, commonly called lantana or shrub verbena, is native to Central and South America. It is an upright frost-tender shrub that grows 3-6’ tall. It has escaped gardens throughout the world and is considered to be a noxious weed in many frost-free/tropical areas where it can rapidly spread to form dense thickets. It has naturalized in parts of the southern United States including southern Florida, the Gulf Coast and southern California. When grown in St. Louis, plants placed out in spring after last frost date may grow to as much as 3-4’ tall by the end of the summer. Tiny 5-lobed flowers in dense hemispherical clusters (to 2” diameter) bloom summer to fall. Flower colors include white, yellow, orange, red and purple, often mixed in the same cluster. Ovate, toothed, dark green leaves (to 4” long) are rough-wrinkled above. Leaves are aromatic when bruised. Many cultivars and hybrids are available, including dwarf and trailing plants, to the point where the straight species is seldom found in commerce. Flowers are attractive to hummingbirds, butterflies, and other pollinators.
Genus name comes from the Latin name for Viburnum transferred to this genus.
Specific epithet is a South American vernacular name for a species of Lantana.
'Samantha' is a variegated cultivar of lantana that features chartreuse streaks along the leaf margins and bright yellow blooms. The small, tubular flowers are held in slightly rounded, 1-1.5" wide, terminal clusters. Mature plants will reach up to 2' tall and 3' wide with a dense, bushy, mounded to trailing growth habit. Fruits are occasionally produced but seeds are typically not viable.
Problems
No serious insect or disease problems. Watch for whiteflies and spider mites, particularly on overwintering plants.
Uses
Annual bedding plant. Containers. Houseplant.