I plant zucchini and vegetable marrow every year - not with the same results from year to year. Besides them, I have grown lots of pattypan - nice pickled when very young, a pain to peel when grown - yellow crookneck, and spaghetti squash. Don't care for the latter. Really, the only one I like to eat is vegetable marrow - the white, tender kind - with sour creme and dill. They're impossible to buy in stores or even farmers markets.