I went to Home Depot and got a couple of 10 ft long pressure treated 2x4s, Their wasn't a lot of room between the patio and fence so I was limited on materials I could use and 2x4s was the best thing. I go pressure treated because it last 3-4 times longer and it helps fight against insects and bugs from getting to it. Then I cut some pieces and cut the ends to a point to make home made stacks. I screwed it all together and then hammered the stacks into the ground. It gives me about 4 inch off the ground and then when I put plants in they can go down as far as they need. I put down some weed sheet to keep weeds away from growing in the area. I haven't planted any plants yet, I'm not 100% which plants I want their. I might put some roses at the end between the shed and fence and then put some things like lilly's in the middle and maybe some small plants like pansies (or kinds that come back every year) but that type of look.
Before

Before

Before

Just got done digging up weeds and grass and tilling the area and putting down the new 2x4s

The end of the flower bed between patio and fence

Frame of the bed is togerher but not hammer down yet.

Ground tilled up

The area between the fence and shed has a lot more room then the patio and fence at the other end. This is where I was thinking about putting roses.

The frame work hammered down now

The frame work hammered down now

The frame work hammered down now

Adding the weed protection sheet

Weed protection sheet down and in place

Weed protection sheet down and in place

The finish flower bed frame

The finish flower bed frame

The finish flower bed frame

The finish flower bed frame

The finish flower bed frame

The finish flower bed frame

The finish flower bed frame

The finish flower bed frame and now ready for mulch and plants

Finished with flowers and mulch

Finished with flowers and mulch

Finished with flowers and mulch

Before/After
I just finished the 1st of at least maybe 3. I kind of have a couple of other ideas to but the first 3 is the main ones.