Vegetables need adequate and consistent water to grow well. Most vegetables are 70-95 percent water, and they need to get all that from somewhere. When it comes to watering your vegetable garden, I have found that a drip irrigation system with an automatic timer is the best way to achieve the consistent watering that crops require. A drip irrigation system, while a little more costly and time consuming to install than say, a garden hose, will end up saving you time, water and money in the long run.