Michigan Gardening: when will I have Zucchini, 1 by museumgirl

museumgirl wrote:
Its our first year trying to grow zucchini. It is now July 31st, the plants are HUGE, healthy-looking, and have blossoms, but we don't see ANY developing fruit. Seems when I was a kid we had these things coming out our ears by now. Any local gardeners with advice?
We started them from seed directly in the garden, must have been around the end of April. We're wondering if they will eventually produce anything?
The picture below was taken July 8th, you can see the plants in the foreground, near the tomatoes, which are doing great....