This member of the hollyhock family generally stands up on its own, but it can also be kind of floppy. I would just use bamboo canes to surround the plant and tie it up. Keep in mind that this is an annual flower that will die back in the fall. However, these plants like to self sow freely so you may find many baby ones in your garden next year. Just be sure it's in a sunny spot. It's pretty tough and doesn't require much assistance. In fact, I haven't planted it for years and am still finding it--I even have one that sprouted up in my horse pasture close to the compost pile.