Polyploids are plants with more than two sets of chromosomes. A tetraploid is only one of a whole series of polyploids. Triploids have three sets of chromosomes, tetraploids have four sets of chromosomes, et cetera. Tetraploid Tetraploid daylilies are heralded by some growers as having a number of advantages over diploids. Colors of the flower tend to be more intense.
Scapes tend to be sturdier and stronger.
Substance of both flower and foliage tend to be heavier. Vegetative vigor in leaf, stem, and flower tend to be greater. Breeding possibilities tend to be greater because of an increased number of chromosomes. Diploid Diploid daylilies continue to charm growers with their exquisite flower form, grace, and color. Good pink daylilies are still more prevalent in the diploid ranks.