salvia: Salvia. This one needs to come with a warning label. First, it’s a psychoactive plant. Second, I’ve heard you can’t buy it in all states because it IS a psychoactive plant. But this is the deal, it’s super hardy, grows like a weed (pun not intended), and blooms all summer long. Another downside or perhaps upside, depending on how you look at it, it multiplies like nuts and can easily take over a garden space in no time.