Siberian Wallflower (Cheiranthus Allionii) - If you are looking for something new to add to your garden that will brighten it up, consider planting Wallflower seeds. The Siberian Wallflower wildflower has vibrant orange flowers on plants that grow to 18 inches high. It has a lovely scent and is very attractive to butterflies. It can beautify an entire meadow with its brilliant orange, phlox-shaped flowers. Siberian Wallflower plants are not as hardy as their name would imply. In warmer climates it will act as a perennial coming back year after year. Wallflowers are used as a cut flower, in dried arrangements, potpourri, and as a fabric dye. Directly sow Wallflower seeds outdoors into loosened soil. Press the wildflower seeds into the soil but do not cover. Sowing of Siberian Wallflower wildflower seeds can either be done in spring or fall.