Morning glory is a quick-growing annual vine that produces an abundance of purple-blue flowers. The flowers open in the morning, closing up as temperatures begin to rise in early afternoon. Morning glory must be replanted each year, so saving the seeds from your existing vines allows you to replant without the expense of purchasing fresh seed stock year after year. The seeds are quickly lost to the garden if they aren't harvested before the pods open, so proper timing is vital.
Check for the seed pods once the flowers begin to wither. The seed pods are located where the base of the petals joined the flower and are round and green.
Cut off the seed pod with a pair of shears once it begins to turn brown but before it begins to split open. Place the pods into a bowl as you harvest them in case any split open once they are cut.
Rub each pod between your fingers until it cracks open. Shake the seeds out into a bowl and dispose of the pods. Separate out any excess plant material that is mixed in with the seeds.
Place the seeds inside a jar or envelope. Label the jar with the year harvested and the type of seeds.
Store the morning glory seeds in a cool, dry place until you are ready to plant them the following year. Store in a basement, unheated garage or in the refrigerator.