Hi Kay!
First of all, Welcome! You'll find tons of info on all aspects of gardening on this site! (And you'll find some pretty nice folks, too!
)
In regard to your question, I have some questions of my own first...
Is the 15x25 area you're speaking of in sun or shade or maybe some of both?
Do you know what
plant hardiness
zone you're in? (If you don't know, we can help you find out)
Is the area close to your house or another building? If so, is it on the North, South, etc.?
Would you like the area completely planted, or would you like a seating area, pathway, etc.?
Is privacy an issue in the area?
Does the area need to be child or pet "friendly"?
Do you want lots of color, or would you prefer a "green" feel?
I know this seems like alot of questions (and there will probably be more
) but with the answers, I (and alot of the other members here) will be able to help you design an area that will not only look good, but suit your needs, too.
Let us know, and we'll help ya figure it out!
Nikkal