This verbena species is a very low grower, perfect for a sunny rock wall. In 2002, we saw this growing in the wild at the base of the Argentine tree cactus in the dry mountains of northern Argentina. Verbena peruviana has tiny leaves and is smothered with brilliant, true red flowers (RHS 45A) from spring through summer...a hummingbird delight. More water...more flowers. You will need sunglasses when you look at this one too long...very bright!