Lantana acts as a perennial in Texas. Once the root structure becomes established you may have it in your garden for a long, long time. Once established lantana can ride out the hot Texas summers and even drought, returning the next year from the root structure.
Having a sterile lantana which does not form berries means you will have continuous blooms. If your lantana has berries they must be removed before the lantana blooms again. The berries are considered poisonous.
Below is a combination I always plant: lantana with purslane. The purslane pops up as lantana expands and provides color variation to the solid lantana whether you are aiming for a contrast or a blend in color. This makes the planting so much more interesting. Also as the atremsia in the background gets leggy the lantana will cover that.
‘New Gold Lantana’ and ‘Gold Mound Lantana’ are heavy bloomers with deep gold flowers. They reach 2 feet tall and 4 feet wide and they do not produce berries. I have always planted Purslane with my lantana. Purslane closes at night so I have never liked to plant it by itself. This mixture of orange purslane, gold lantana and artemesia is a stunning combination.
New Gold, Dwarf Pinkie, Samantha (Lemon Swirl), Weeping Lavender and Weeping White are sterile.
‘Miss Huff’ is the much loved coral, yellow and orange lantana which can reach 5 to 6 feet tall in one season. It has no berries.
Mozelle is the pale yellow lantana center circled in a light pink it also reaches five to six feet and has no berries.
Irene is a beautiful magenta color with a gold interior. It reaches four feet.