You can grow tropical lantana (Lantana camara) in most climates. It grows as a perennial in U.S. Department of Agriculture plant hardiness zones 8 through 11, where it's evergreen. In cooler climates, the upper portion of the plant dies back to the ground at 28 degrees Fahrenheit, but the roots survive and sprout when it warms up again. Lantana blooms year-round in tropical climates, and blooms in summer and fall in areas where it dies back from the cold. Lantana is considered invasive in some areas, but some non-invasive varieties are available.
Soak 1/3 gallon of coarse sphagnum peat moss in water for one hour, three to four months before the last estimated frost date for your area. Add 1/3 gallon of sterilized loam to a clean bushel basket.
Squeeze the water from the sphagnum peat moss and place it in the bushel basket. Add 1/3 gallon of perlite to the bushel basket.
Pour just enough water, about 1/4 to 1/2 cup, to make mixing the growing medium ingredients easier.
Add small amounts sphagnum peat moss if the growing medium feels sandy between your palms. Add small amounts of perlite if the medium feels sticky in your hands. Continue adding small amounts of perlite and peat moss to the medium until it feels loose in your hands.
Pour the growing medium in 4-inch pots until it reaches about 1/4 inch from the tops. Soak the lantana seeds in warm water for 24 hours. Plant two or three lantana seeds, about 1 inch apart, in each pot. Grow the lantana indoors until the threat of frost has passed.
Test the soil pH in an area that receives full sun at least six months before planting lantana. Lantana does well as a bedding plant, as a wall-side border, and when planted on slopes and banks that get full southern or western exposure. You need about 3 square feet of space for each lantana, depending on the cultivar.
Sprinkle elemental sulfur or dolomitic lime over the soil if the pH tested above or below 6.5 to 7.5. Apply 5 to 6 1/2 ounces of limestone per 10 square feet to raise the pH of sandy soil 1 pH point. Apply 11 to 12 ounces of limestone per 10 square feet to raise the pH of loamy soil 1 pH point. Apply 12 ounces to 1 pound of limestone to raise the pH of clayey soil by 1 point. Distribute about 1 ounce of sulfur per 10 square feet to lower the pH of sandy soil by 1 point. Distribute 2 1/2 ounces of sulfur per 10 square feet to lower the pH of loamy soil by 1 point. Distribute 3 1/2 ounces of sulfur per 10 square feet to lower the pH of clayey soil by 1 point.
Cultivate the sulfur or limestone into the soil 8 to 12 inches deep, using a spading fork or rototiller.
Pull all the weeds from the planting area and spread 3 to 4 inches of compost over it if you have sandy soil. Spread 2 to 3 inches of compost over the planting area if you have a lot of clay in your soil. Spread 1 inch of compost over the planting area if you have fine, silty soil.
Work the compost into the soil 4 to 6 inches deep, using a spading fork or shovel.
Dig one hole for each lantana, about twice as wide as the pots and just as deep. Space each hole at least 3 feet apart from the next hole and at least 3 feet away from other plants.