Depending on the variety, pincushion flower, or scabiosa, may be an annual, a perennial or a biennial. Scabiosas require full sun. After the first bloom, cut the flower stalks back for a possible repeat performance. Achillea attracts hover flies. If you grow it from seed, scarify the seeds before planting by rubbing them with rough sandpaper, nicking them with a knife or soaking them in warm water overnight.
Most catmints attract bees.
The genus verbena includes both annual and perennial species. It requires full sun. Deadhead spent flowers to prolong the bloom period. Santolina attracts parasitic wasps, which lay their eggs inside undesirable insects' eggs and in caterpillars and eat their way out. Keep plants bushy by frequently pinching back the growth tips.