Happy Halloween! One of the great things about fall landscape design is the continuity of decorating theme between its 2 major holidays: Halloween and Thanksgiving. Oh, sure, after Halloween it's time to take down all the spooky yard decorations. Still, the fundamental landscape design theme for both holidays is the harvest. All your corn stalks, pumpkins, scarecrows and gourds can stay put and serve just as well as Thanksgiving yard decorations.