How to Grow Morning Glory (Ipomoea)
With spectacular trumpet-shaped flowers up to 6 inches in diameter, morning glories (Ipomoea spp.) are most frequently grown as annuals, though they can be perennial in U.S. Department of Agriculture plant hardiness zones ranging from 8 to 12. Their heart- or ivy-shaped 4 to 6-inch leaves decorate twining vines which can climb to 20 feet or more. Morning glory blooms usually close by noon on sunny days, but frequently will remain open longer on overcast ones. Easy to grow, the plants can become invasive in almost any climate due to their heavy self-seeding. Understand the Types of Morning Glories Most of the intricately patterned morning glories, including tie-dyes and those with white edges or spatters such as “Chocolate” or “Blue Silk,” are Ipomoea nil -- also known as Ipomoea imperialis -- types (USDA zones 9 through 12). They produce flowers up to 6 inches in diameter and are often known as Japanese morning glories. Ipomoea tricolor varieties (USDA zones 8 through 12), incl