What are some good borders for a flower bed?

We use decorative shapped brick boarders...the kind you can get at Lowes or Home Depot. We have them stacked about two high and they work great. Of course, my flower beds are really overgrown right now. Our weather here in Southern Oregon hasn't been conducive to getting out and playing in the dirt this spring...in fact last night it was below freezing again, and there was snow in the mountains.

I've included a photo of my flower bed. I used rocks from a creek as the border. This year I am going to not plant a flower bed, remove the perennials and make a parking slough. I have out grown my space and need that area to park my trailer. I have a landscaping company and sometimes when I get home at night there isn't a place to park my truck with the trailer attached. You might be able to get bricks for free if you can haul them. Look in the local bulletin board weekly sale papers. There are people wanting other people to take their unwanted landscaping items all of the time. You could always be creative and use sticks or small trees. It doesn't take very long to cut down a tree that is about the size of a softball is around. What about old tires? You are in Ohio that is close enough to West Virginia to use tires for a border. LOL Blocks are expensive. Before you buy shop around. There are local distributors of blocks that might give you a better price than Lowe's or Home Depot. The one here is called "Central Supply". They have a website centralsupplywv.com and might have a store in your area.