Create a Tower of Climbing Annuals
Some feature plants are best grown in pots where they are much easier to view and care for, and you can put them at center stage. These morning glories (Ipomoea purpurea) grow very quickly from seed sown in the spring.
From: DK Books - Containers for Patios
Step 1: Add Supports to Container
Arrange a wigwam of canes or old stems, such as stripped forsythia, around the edge of a container filled with potting mix. The wigwam doesn't need to be very neat—the stems will soon be obscured by the climbing plants.
Step 2: Tie Supports Together
Tie the tops of the stems together. Then wrap string or raffia around the canes, about halfway up, to strengthen it. After planting, add more at different heights to make it easier for the climbers to spread across the frame.
Step 3: Plant Seedlings
Make planting holes by each support with a trowel or spoon. Remove the seedlings carefully from their pots. Gently pry apart the plants, handling them by their leaves, not the delicate stems. Plant one in each hole.
Step 4: Water and Watch Them Grow
Firm all the plants in the soil, then water well. You may find it necessary to add an extra circle of twigs to help train the climbers onto the canes, and to stop them from climbing in the wrong direction.