Answer: This euonymous will mound and form a shrub if grown in the open but will climb if grown next to a wall. It does not use a trellis to climb; instead of winding through something, it uses little roots to climb the wall. I would not recommend using this plant in planter boxes year round. The reason for this is that the roots are not as well insulated as they would be if planted in the ground so the extreme cold and exposure to oscillating temperatures can stress or kill it. Also, in your area, I would not expect this plant to be fully evergreen. It would be more likely to discolor and possibly defoliate during the harsh winters in your area. I'm sorry but I do not think this plant can do what you are hoping for.
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