Watering
This is Mother Nature's job most of the time. All your water should come from the heavens. If you find that you have a drought or a long warm spell during summer then you may wish to carry some water to your grow area. If you have to trek over long distances then it is suggested that you fill a sack with plastic bottles of water.
Some garden growers use sprinkler systems during dry spells. This is great but again may attract unwanted attention that you do not need.
How much water your plant needs depends on how big your plant is. Some larger plants will require a minimum of a gallon of water per day. Natural loam soil will be able to hold water for anywhere between 4 - 6 weeks before becoming extremely dry under the sun.
Deep pockets of water may be held below the surface that would not be noticed by the grower on the surface. The best way to judge whether your plants need water or not is by the way they look. If they are wilting badly, then they need water. If not, then they may be okay. In general outdoor plants tend to wilt a small bit anyway during the summer months. If you want to really make sure that your plant has a water source underneath it, simply dig a small hole about a foot deep to the side of your plant but keep an eye out that you do not hit any major roots. Put your hand down inside the hole, does it feel dry? Or does it feel cool and moist? If it is cold and moist then the soil has stored some water below the surface. Your plants can drink this without problems.