In an effort to try to keep the weeds in the vegetable garden down, we mulched our vegetable garden with a sheet of inexpensive black plastic bought from the hardware store (not the more expensive stuff from the garden center).
We cut holes for the tomato and zucchini plants, and wide slits for the rows of beans, and then punched holes in the black plastic all over with the spikes from the bottom of the tomato cages, to let more water in. We anchored the sides of the plastic with dirt/rocks.
This method has worked well; it keeps the weeds down to almost none (less labor), and keeps the moisture in the soil under the plastic (less watering). We have had our best tomato yields ever using this method, and the plastic can be reused for years.
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