Common Beginner Mistakes and How to Avoid Them A frequent mistake beginners make when creating a moody dark botanical gallery wall is selecting frame sizes that are too small for the wall space, resulting in a sparse, floating appearance. Always ensure the total width of your gallery collection spans approximately two-thirds to three-quarters of the width of the furniture piece below it. Another common error is hanging artwork too high on the wall; the center point of the gallery layout should sit roughly fifty-eight to sixty-two inches from the floor, or six to eight inches above a headboard. Additionally, using shiny, reflective glass over dark prints can cause excessive glare from room lights, completely obscuring the subtle details of shadowy artwork. Opting for non-glare or UV-protective matte glass ensures the dark botanical imagery remains visible and striking from every vantage point in the bedroom.