a small spot close to my house (circled in red) is probablly lower than the ground around, so whenever it rains, it takes much longer for it to dry. It rained two days ago, and has been sunny since then, but the ground is still kind of wet. So I am thinking of making a rain garden over there. Is there any thing I need to pay attention to? BTW, I plan to follow the following video on youtube [ame=http://www.youtube.com/watch?v=PK6tQgkuZZM]YouTube - How to Install a Rain Garden[/ame] thanks.