Hello all. I have a mulch bed around 1.5 feet wide and 56 feet long
that runs alongside the length of my driveway. Currently, it is just
that, a mulch bed, with no ornamentation. I am planning on filling in
this section with a combination of plants, and solar lights. Something
like this:

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PLANT LIGHT PLANT LIGHT PLANT LIGHT
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I am going to need about 6-7 plants. Can anyone recommend an annual
plant that can survive moderate winters, that is relatively low-lying?
Maybe something that can be trimmed to form a circular shape?

Thanks!

-AJ