Spray your zucchini plants once a week with a solution of 1 part milk to 9 parts water. You can use any kind of milk available. This will keep your plants from getting powdery mildew, a serious threat to zucchini plants.
Growing squash and zucchini plants vertically. Great for a small space! - could do this and tie it to my fence... oh! I could get some lattice from Home Depot and lay that against my fence, then tie it to that. Awesome.