Looking to bring some outside greenery indoors? Maybe you already have an indoor garden and are looking to create a botanical jungle. Whatever the case may be, houseplants are an ideal inexpensive way to beautify your dwelling. You'll be rewarded with purer air and you're sure to enjoy watching your plant sprout, climb, and even flower. Of course, before you start working on crafting a greenhouse, you need to know what kinds of plants you can grown...