Next year I need to look at the seed package better. When it reads marigolds, 30 to 36" high it means that is not the height in the middle of the summer, liked you hoped, but at the end of August. I thought for awhile I got the wrong seeds until I looked again. Now that I know they will be that tall inside my 12 inch boxes, I will plant them in a better place. I will get some others that are shorter and faster growing for my boxes.