your wreath to be full. if you pick only flowers that have a bare stem and one single flower at the top, your wreath will be too bare. therefore, half of your flowers should be the type that have blossoms lining the entire stem.
regarding colors, you might pick some dark flowers and some bright flowers to contrast each other. or, you might pick flowers of two colors that are opposite of each other on a color wheel. for example, blue and orange are opposite of each other on the color wheel. considering this, you could pick a few different blue flowers along with a few different orange flowers. it’s also 