Choose a type of dwarf morning glory carefully. Most offered in reputable seed catalogs are fine, but Convulvulus arvensis spreads invasively and becomes a pest.
Soak seeds in warm water 24 hours before planting.
Plant from seed directly in the soil after your region's last frost date. Plant about 1/8-inch deep.
Start seedlings indoors, if desired for earlier bloom, five to six weeks before the last frost date. Transplant outdoors after the last frost date.
Fertilize lightly, if desired, two or three times during the growing season. Dwarf morning glory isn't a heavy feeder.
Keep reasonably well watered. However, this warm-season annual likes hot weather and suffers only in very dry conditions.
Pull up and discard plants in autumn, once frost has felled the plants.