In the cool weather seasons of fall and spring, count on flowering stock (Matthiola incana) to deliver amazing fragrance with its strong and spicy clove scented blooms. This variety is ‘Sugar & Spice,’ and it grows 10 to 12 inches tall and 8 to 10 inches wide. Stock is a much beloved old-fashioned flower, a common plant in Victorian-era gardens. The modern varieties offer things like better heat tolerance and a vivid range of jewel-tone blooms, including deep violet, rose-pink, fuchsia and white. Use flowering stock in containers or planting beds, placing it near an entrance so you can savor the scent. This is an annual plant, dying after hard frost.