09/01/2015 at 12:54
Agree about the marjoram , it's a butterfly magnet. Also bergamot (Monarda) and the shrubby salvias were rarely without a butterfly or two but the most unexpected butterfly plant was Herb Robert. It seeded itself into my rockery wall and put on a good show with its ferny leaves and masses of little pink flowers, plus clouds of little white butterflies. These also like the great willow herb that grows in our boggy wilderness area, but I wouldn't recommend that to normal gardeners! The perennial wallflowers were popular too.