In many parts of the US and Canada lantana functions as an annual. In reality, they are a tender perennial, in warm winter climates they become heat tolerant flowering shrubs.

If you live in an area where Royale Cosmo Lantana is perennial they are essentially trouble free, they can be pruned at any time of year and usually benefit with a harder shape-up pruning in early spring after the last frost date. Midsummer fertilization can help overcome any slow down in growth during the dog days of summer and help bring even more flowers, reinforcing its reputation as a low-maintenance lantana.

According to the Humane Society of America Luscious Lantana leaves can be toxic to pets. This means that the plants are generally identified as having the capability for producing a toxic reaction.

Royale Cosmo Lantana seeds vary considerably. If you see a lot of berries developing you may want to deadhead the plants to help with continuous blooming. If there is a low berry set, deadheading shouldn't be necessary for continuous bloom. Some varieties are self-cleaning.

An application of fertilizer or compost on garden beds and regular fertilization of plants in pots will help ensure the best possible performance of heat tolerant flowering shrubs.