When you have a garden, you have to keep it watered, not flooded with water, but enough to keep it wet. If the ground is not wet enough the ground will dry up and become hard. When the soil becomes hard it makes it harder for the plants to come through the dirt or they will not come out at all. If they do not have enough water, they will wither and die or at the very least will not produce many flowers or vegetables. Soil has to be soft in order for the plants to grow and for the roots to spread out. When soil is very dry no water can get to the plants to feed them so they will die.
When you water your garden it should not be flooded because that can kill the plants as well. To much water is not good. It will put too much around the plant and it will basically drown. The roots can rot and the plant will die from this. You will want to water it enough so the soil will get wet good enough so the plants will get the water they need. You put sprinklers at both ends of your garden so the water will get to everything. You can water it with a hose yourself, but just watch how much you put down.
Your garden will need to have water everyday, but if it has rained you will not need to. A lot of people use rain water for their gardens instead of the water out of the hose. This is because rain water is good for it, it helps the plants grow better and healthier to. If the surface of the soil gets a little hard you can take a garden hoe and loosen the ground. But you do not want to go in the soil deep because you can hit roots or the plant.
If you have a flower bed in front of your house under the gutters you will want to make sure it is cleaned out so the water will not go over the sides of it. Because it can cause water to flood it and damage your flower garden. Too much water can cause the bulb of the flowers to get washed out of the ground. It can also move them together or it can just kill the flowers. This will depend on how much water floods it. You will want to check your gardens after ever rain storm to make sure it did not damage them.