When to plant:
Morning glories are easily grown from seed and can be started indoors four to six weeks before the last spring frost. If sown directly into the garden, plant after any threat of frost and once the ground has warmed up to 64 F.
Where to plant:
Pick a site that gets plenty of sun. They will tolerate some very light shade, but bloom their best in full sun. Because of their rapid growth, choose a location that will allow for its mature size. Morning glories will readily self-seed if allowed, so make sure they are in an area that is accessible for cutting back spent blooms before they go to seed or an area where self-seeding is acceptable. Be considerate of neighboring yards and where the seeds might fall.
How to plant:
If planting from seed, file seeds to break the outer shell and soak for 24 hours prior to planting to help with germination. Cover lightly with one-quarter to one-half inch of soil and water thoroughly. When transplanting, be careful of the roots, as they don’t like being disturbed. Water deeply for several days after transplanting to help the roots get established in their new home. Helpful hint: If starting from seed, use peat or other disintegrating pots that can be planted directly in the soil to lessen the stress on the root system.
Morning glories grow quite rapidly once established, up to 12 feet or more in one season.
No pruning is required; but to prevent unwanted self-seeding, old flowers should be thoroughly removed before they form seedpods.
Morning glories prefer moderately fertile, well-drained soil that is kept consistently moist until the plant is well established. Adult plants aren’t as picky about their soil and can tolerate poor, dry conditions.
Amendments & Fertilizer:
Although usually not necessary, you can apply a balanced liquid fertilizer monthly during growing season. Be careful not to fertilize too much as this can produce more foliage than flowers.
Water freely during growing season and once or twice a week during dry periods; but again, established morning glory plants can tolerate drier conditions. Cut back watering in winter.
Softwood cuttings of perennial species can be rooted in spring or summer. Harvest mature seeds in the fall.