Morning glories are popular annual garden vines because they grow in a variety of soil conditions and in container gardens. The flowers usually last for a single morning and die in the afternoon, although on cloudy days, the flowers may last well into the early evening or night.Collecting and saving morning glory seeds from a vine in your garden, or one you may admire in another garden, is just as easy as growing them in your garden. Morning glories require very little attention in the garden and collecting seeds from a morning glory doesn't take any special knowledge.