In east Tennessee, we can go from drought to flood conditions in a weeks time. The old saying goes if you don't like the weather stick around a day or two, it will change.
However, rain is not something we should count on, as the drought a few years ago showed us. We need to plan for water for our gardens, flowers and small plants. The easiest and greenest way to do this is to set up a water capture system. It doesn't have to be fancy, and can be done without costing a cent. My great grandmother did it and I remember as a child wondering why bother when you can just turn on a faucet?
To do this effectively, you need to find a location(the more the merrier) where you have water run off during rain, such as a gutter, side of a barn, storage shed, etc. You place a bucket of some type(my great grandmother used a big barrel)in this area to collect the run off water. You will want to use some sort of mosquito net to cover it with, to ensure that you don't get over taken with mosquitos because of the standing water.
When it comes time to water your flower garden, you flower pots, your small vegetable plants, or other items, you simply get your water from the barrel, and use it for your watering needs. This saves you money on your water bill, reduces dependence on water from outside sources, and uses a resource that would otherwise be wasted.