Deciding how to treat annuals and perennials is simple. Annuals dazzle you in summer, then take their leave. Perennials persist as long as they are welcome. But biennials are a two year proposition in which they are sown one year and bloom the next. If you have never tried biennials you might ask, “Are they worth it? I wait a year for this thing to flower, then it’s gone.” Well, not exactly. Biennials tend to be self-sowers which, once established, create their own little program. You have to get with their rhythm and learn to like their individualistic ways. One way is to give them a designated spot. Plant hollyhocks in the rear of a bed, since they’re tall, and next year they’ll make colorful, towering spires, dropping their seeds and creating a hollyhock neighborhood back there. A foxglove neighborhood might be a spot with dappled shade, in and around a shrub border. Forget-me-nots will congregate in a damp spot. Lupines, once introduced, might reappear anywhere; if it’s the wrong place just yank the ones that don’t fit and enjoy the rest.