Morning glories are vining plants that grow upward along a trellis, fence, arbor or wall and can fill in an area with beautiful blooms in just several weeks. Morning glory seeds are easily sown outdoors after the final spring frost, but can be started indoors about a month sooner. Although morning glories are annuals, they do self-seed if they land on bare ground. Otherwise, you will have to buy morning glory seeds every spring. Plant morning glories in full sun for the best results.
Find out if growing morning glories is prohibited in your state by reviewing the plant profile for morning glories on the United States Department of Agriculture website (see References). As of 2010, all morning glories except Ipomoea carnea, Ipomoea triloba and Ipomoea arborescens are prohibited in Arizona.
Decide how many seeds you want to purchase--usually one seed packet of 25 or more seeds will suffice. Plan on spacing morning glories 6 to 8 inches apart, but buy at least triple the amount you need because not all seeds will germinate and grow well. You can later thin the plants out.
Obtain the seeds at least the night before you want to plant them. According to the University of Illinois, morning glory seeds should be soaked in water overnight to improve germination. Morning glory seeds are available at garden supply centers and through nursery catalogs (most of which are also online).