How to Grow and Care for Evolvulus

Blue Dwarf Morning Glory

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Evolvulus glomeratus (Evolvulus) is unique in that it produces blooms in one of the most elusive colors in the world of horticulture—bright and brilliant blue. It's a tough yet tender perennial in the southern part of the United States, but in other cooler regions of the US, it is grown as an annual and must be replanted every year.

Evolvulus makes a perfect addition to any garden bed or container. When planted in a sunny spot, this low-growing, spreading plant will create a sea of ocean-blue flowers atop green foliage with hints of a silvery sheen.

These plants bloom from late spring until the first frost and will attract plenty of bees and butterflies, who love the nectar-rich blooms. A member of the morning glory family, evolvulus blooms will typically close up on cloudy days, at the end of the day, and in hot afternoon sun.

Evolvulus is considered to be a fairly low-maintenance and self-cleaning plant, so there's no need to remove spent blooms. It thrives in the heat of summer and is fairly drought-tolerant once is has been established with consistent watering. This plant will flourish when planted in a garden bed as a low-growing groundcover plant as well cascading in a container.

Botanical Name Evolvulus glomeratus
Common Name Evolvulus, dwarf morning glory, Brazilian dwarf morning glory, blue daze
Plant Type Herbaceous perennial
Family Convolvulaceae
Mature Size 3/4 to 1 foot tall, 2 to 3 feet wide
Sun Exposure Full sun
Soil Type Moist, well-drained
Soil pH 6-8
Bloom Time Summer through fall frost
Flower Color Blue with white centers
Hardiness Zones USDA 8-11
Native Area South America (Brazil)

Evolvulus Care

When planting evolvulus, trim the plant to encourage branching. You can also occasionally pinch the young growing tips to encourage a bushier plant. As the growing season progresses, evolvulus might begin to look a bit ragged with reduced blooms. At that point, you can trim back the plant to tidy it up and encourage new bushy growth.

Light

Plant evolvulus in full sun, six to eight hours per day, which will encourage continuous flowering throughout the season. Sunlight will also help these plants maintain their compact shape and lush foliage. If evolvulus is planted in too much shade, it can become leggy, sprawl, produce fewer blooms, and lose the silvery sheen on its foliage.

Soil

Evolvulus performs best in average, loamy, well-drained soil, whether its planted in a garden bed or grown a container. Prefers slightly acidic soil pH but tolerates a neutral pH.

Water

Evolvulus does best when it receives consistent, even moisture but it does not like to sit in soggy soil. Once it is established, it tolerates drought conditions. This plant's drought-tolerant nature means that it can be a great option for neglected areas of your garden or in containers that might not receive adequate water. One of the quickest ways to kill evolvulus is to overwater it, which can cause root rot..

Temperature and Humidity

They are happiest and flower best in temperatures above 65 degrees Fahrenheit, and they thrive in the heat of summer. It cannot tolerate frost.

Fertilizer

Feed evolvulus on a monthly basis in spring and summer. Use a general-purpose liquid fertilizer and apply it according to label instructions. In warm climates where it is reliably hardy as a perennial, don't feed in winter

Potting and Repotting

When potting evolvulus, fill a container with a potting mixture that's lightweight and drains well. Moisten the growing medium if its dry, and make sure the container has a drainage hole.

Propagating Evolvulus

These plants will reliably propagate from both seeds and stem cuttings, which can successfully produce a new plant within just two to four months. Start seeds indoors before the final frost of the year. Plants propagated from cuttings will grow best when started in the summer months for next spring; water sparingly and keep the cuttings indoors in a cool and bright location.

Common Varieties of Evolvulus

  • 'Blue Daze': half inch to one-inch ruffled true-blue blooms with silvery-green leaves
  • 'Hawaiian Blue Eyes': one-inch blue blooms with silvery-green leaves

Pruning

These plant are self-cleaning, so deadheading is not required to remove spent blooms. However, trimming these plants back during the growing season will maintain a bushy and less-sprawling shape.

Article Sources
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  1. “Evolvulus Glomeratus.” Ncsu.Edu, https://plants.ces.ncsu.edu/plants/evolvulus-glomeratus/