The flowers usually start to fade a couple of hours before the "petals" start showing visible curling. They prefer full exposure throughout the day and mesic soils. Some morning glories, such as Ipomoea muricata, are night blooming flowers.
In some places such as Australian bushland, some species of morning glories (bindweed) develop thick roots and tend to grow in dense thickets. They can quickly spread by way of long creeping stems. By crowding out, blanketing and smothering other plants, morning glory has turned into a serious invasive weed problem.
History: Morning glory was first known in China for its medicinal uses, due to the laxative properties of its seeds.
It was introduced to the Japanese in the 9th century, and they were first to cultivate it as an ornament. A rare brownish-coloured variant known as Danjuro is very popular. During the Edo Period, it became a very popular ornamental flower.
Ancient Mesoamerican civilizations used the morning glory species Ipomoea alba to convert the latex from the Castilla elastica tree and also the guayule plant to produce bouncing rubber balls. The sulfur in the morning glory's juice served to vulcanize the rubber, a process pre-dating Charles Goodyear's discovery by at least 3,000 years. Aztec priests in Mexico were also known to use the plant's hallucinogenic properties.