El Greco Zucchini This page first published: Mar 31, 2005 · Modified: May 9, 2018 · by CooksInfo. Copyright © 2020El Greco Zucchini has glossy, dark green skin. The plant is an open bush type. History Notes El Greco Zucchini was developed by the Ferry-Morse Seed Company. Referred to as FMX 615 during development.