Hi Ginger,
" I too would like to grow shorter zinnias... "
The Pinwheels, Profusions, and Zaharas are all short mildew resistant strains.
In "regular" Zinnia elegans (violacea) the Thumbelina is the shortest, starting to bloom at only 3 inches and reaching an ultimate height of 6 inch bushes. Zinnita is a 12-inch F1 hybrid. Short Stuff has relatively large flowers on a short plant. Zinnia Magellan is a bedding zinnia 12-14 inches high and with many 4-inch blooms. Zinnia Dreamland is similar to Magellan.
ZM