While Kellie harvests a bunch of zinnias, she's also thinning the bed and grading the flowers. Only the best flowers are bunched. The flowers dropped on the ground are a crucial aspect of creating quality cut flowers.
Foliage is stripped from the lower part of the stem and any damaged leaves are removed. With zinnias, large side branches are cut off. Stripping them causes too much damage to the stem.
The finished bunches are 18-24 inches tall and the cut and thinned bed will continue producing flowers for a month or more, depending on conditions.