This forum is great for lawn care however I find it lacking in landscaping input. I would love to find a site similar to this in that aspect or see this forum grow more in this section.
I personally like natural edging to garden beds and think they look best without being raised much if any. That location looks fairly close to the neighbors house and I would be a little concerned with raising the area and creating new drainage issues. Could just be the angle of the photo though.
Keep in mind the mature size of what you will be planting to have correct spacing from the fence and other plants.
An example of natural edging and not raising the ground taken from google image search below.
I personally like natural edging to garden beds and think they look best without being raised much if any. That location looks fairly close to the neighbors house and I would be a little concerned with raising the area and creating new drainage issues. Could just be the angle of the photo though.
Keep in mind the mature size of what you will be planting to have correct spacing from the fence and other plants.
An example of natural edging and not raising the ground taken from google image search below.