Posted: 09/08/2013 at 18:31
nodflisab-did you buy bush or trailing lobelia? By the sound of it, you got trailing, which will grow long, whereas bush will form a neat compact mound.
It was classic in the 60's& 70's to grow allysum(white) & lobelia (Cambridge Blue was light blue) or dark - can't remember the variety planted by the edge of path/lawn. Then along came white, mauve, etc varieties- they were mostly for hanging baskets.
Behind would be red salvia, French marigolds and busy lizzies. African marigolds were often planted too, to give height.
Hope this helps.