Morning Glories can be difficult. You have to presoak the seed for 24 hours, the seedlings can become an intertwined mess if you let them go to long before planting. They are slow starters and don’t really put on a show until late in the season. They are prodigious self-sowers to the point where they can become your next worst weed.
But if you want a quick annual vine to cover a fence, or trail up a trellis or pole, one that can put on a breathtaking late season show, they are worth the trouble. They come in a wide range of amazing colors and color combinations with magenta, cyan, purple, blue and white the normal range. Yellow and colors leaning towards red are seen, but not as commonly. The basic flower form is the typical trumpets, but there are many variations on this, from fully double, ruffled and fluted. The flowers range in size from a few inches to up to 6 inches. The vines range from a well behaved 8 feet to over 20. They prefer full sun, but will do well in partial shade, but don’t expect as many flowers, and much longer vines, always reaching for more sun.
Some hybrids will self-sow true to form, but most revert back to and old fashioned standard called “Grandpa Otts” which is a rangey vine with an attractive 3 inch dark purple flower. I have seen some hybrids revert back to an invasive vine with insignificant flowers but the purple type is more the norm.
There are many hybrids, but one of the most long-lived and beloved is “Heavenly Blue.” As you can see by the pictures the name is an apt description of the color as its translucent petals allow the light to pass through to great effect. Few garden flowers capture this breathtaking sky blue color.
Of all the difficult attributes of Morning Glories, the most disappointing is their delicate flower petals cannot withstand the afternoon sun, so their true glory can only be enjoyed in the morning.