Plant Delights used to sell a bunch of different colors that were supposed to be hardy perennials here in the Raleigh area. I think they do better towards the coast with sandier soil and milder winters.

Not a dark purple like Homestead, I grow 'Imagination' that is more a lavender. The foliage is lacy and fine, but this plant blooms non-stop from spring until fall. Though until Christmas if not too cold like this winter. Seriously!

Just throw down some seeds in the fall and next spring, every seed will have germinated!

Cameron

Here is a link that might be useful: verbena 'Imagination' in my garden