Japanese Morning Glory 'Silky Blue'

Ipomoea nil

Family: Convolvulaceae (kon-volv-yoo-LAY-see-ee) (Info)
Genus: Ipomoea (ip-oh-MEE-a) (Info)
Species: nil (nil) (Info)
Cultivar: Silky Blue
Hybridized by E. Hill
Registered or introduced: 2003



Vines and Climbers

Water Requirements:

Unknown - Tell us

Sun Exposure:

Full Sun

Sun to Partial Shade


Grown for foliage

Good Fall Color

Foliage Color:

Unknown - Tell us


Unknown - Tell us


Unknown - Tell us


Not Applicable

Where to Grow:

Unknown - Tell us


Seed is poisonous if ingested

Parts of plant are poisonous if ingested

Bloom Color:

Light Blue

Dark Blue

White/Near White

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Bloom Size:

Unknown - Tell us

Bloom Time:

Mid Spring

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Other details:

May be a noxious weed or invasive

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Unknown - Tell us

Propagation Methods:

From herbaceous stem cuttings

From seed; direct sow after last frost

From seed; germinate in a damp paper towel

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds


This plant has been said to grow in the following regions:

Ellicott City, Maryland

Natchez, Mississippi

Dundee, Ohio

Philadelphia, Pennsylvania

Portsmouth, Rhode Island

Jacksonville, Texas

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Gardeners' Notes:


On Mar 16, 2008, bluespiral from (Zone 7a) wrote:

Zemerson's remark about Blue Silk being a parent of Silky Blue is interesting, because upon growing both of these vines from EmmaGrace last summer, I noticed that the seed of both cultivars shares that duality of light and dark seed.

In Silky Blue, the light seeds were slightly darker than the light ones of Blue Silk, and the dark seeds were slightly darker than the dark ones of Blue Silk.

In Silky Blue, out of 3 vines, 11-1 was a blue tending slightly toward turquoise, 11-3 was more of a medium, dusky, powdery blue, and both 11-1 and 11-3 had light seeds. 11-2 started out as a solid dark navy blue flower, but as the season progressed, it had more and more blizzard pattern, and one flower was completely double. 11-2 had the dark seeds.

Both ... read more


On Nov 13, 2005, zemerson from Calvert County, MD (Zone 7a) wrote:

Beautiful hybrid by EmmaGrace, I believe 'Blue Silk' was one of its parents. The parent seeds I recieved were white like 'Blue Silk's seeds but the seeds I collected were black. The hybrid has black seed genes as well as whitish/cream but they are not as predominant as the cream variation.