Most of my garden consists of corn and green beans. I do not water those unless there is an extended dry spell. I have a large garden (I planted almost 4 lbs of each kind of seed) and if the plants are showing signs of heat stress and there is no indication that it will rain soon, I go to my local co-op and get one of their 1000 gallon tanks full of water and put it on my garden. I do that once per week until the dry spell breaks. Letting the plants get a little thirsty before they get more water forces them to push their roots deeper looking for water. That makes it become a sturdier plant that can withstand short dry spells without becoming stressed. I usually have a few tomato, zucchini and cucumber plants also. They are a little more water sensitive, but I let them get a little thirsty also.