If you don't have room for this rambunctious rambler, consider its annual counterpart, I. tricolor. Sheryl trains them along the wire fencing of a maze. "They're a must-grow," she says. "Structures that support them don't have to be as strong as for perennial types."
The Loziers' Summers Past Farms ( www.summerspastfarms.com or 619/390-1523), a 5-acre herb farm and nursery near San Diego, is one good place to see and buy morning glories.
No matter which variety you choose, spring is the perfect time to plant. Nurseries stock perennial morning glories in pots and sell seeds of annuals. Plant in well-drained soil after all danger of frost has passed.