Although some alliums produce a huge flower when in bloom, shorter varieties add impact without stealing the show. The star of Persia (A. christophii) was bred into a variety of colors, including white, blue and pink. Plant forget-me-nots around A. christophii so they hide foliage as it begins declining. The allium bloom’s texture adds another dimension to a monochromatic color scheme.
Daffodils are the little black dress of the flower world -- they go with everything. Traditional yellow daffodils create contrast against the forget-me-not’s blue flowers and grey-green foliage. Daffodils don't stop at yellow. They come in a range of colors from pure white to bicolors in combinations of yellow, white, pink, peach and orange. Minnow daffodils sport tiny flowers on scale with forget-me-nots.
Hyacinth (Hyacinthus orientalis) is an underutilized spring-flowering bulb. With a flower spike 12 inches tall, this small plant makes a large visual impact. They are bred into a variety of colors including yellow, white and pink for contrast with forget-me-nots. Both hyacinth and forget-me-nots bring color to rock gardens.
Spring snowflake (Leucojum vernum) with its grasslike foliage and white flowers that drip from 1-foot tall stalks is nearly the opposite in form from the forget-me-not. They both naturalize well, running wild if given the chance, and rough it in a rock garden. Depending on the forget-me-not variety planted, spring snowflake flowers may hover above them like tiny umbrellas.