Stock is a genus of about 50 species of plants. Stocks are grown as annuals that reach heights of growth of 20 to 28 centimeters thick, woody at the base, and with numerous foliar scars and branches with terminal rosettes of leaves. Stock develops small blooms that are perfect for adding a pop of color to any bouquet. stock flowers require moist, well-draining soil and full sun Stock flowers bloom from spring to fall and come in a multitude of colors ranging from soft white to bright purple.