I have no idea but can tell you what I see what the landscapers do in my area year round. I do not know if the courses include total design outside of just plant material.
In my area the landscapers decorate for the holidays Halloween, Thanksgiving, Christmas. after Holiday, Fall design including hardscape. They work year round with everything outside looking attractive including when we are buried in snow they even have a crew to remove the snow. They do more than just planting a garden for summer view only.
