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Japanese Morning Glory 'Heian no Umi'

Ipomoea nil

Family: Convolvulaceae (kon-volv-yoo-LAY-see-ee) (Info)
Genus: Ipomoea (ip-oh-MEE-a) (Info)
Species: nil (nil) (Info)
Cultivar: Heian no Umi
Additional cultivar information:(aka Heian Umi)



Vines and Climbers

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

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

Flowers are fragrant

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Suitable for growing in containers


12-15 ft. (3.6-4.7 m)


3-6 in. (7-15 cm)


Not Applicable

Sun Exposure:

Sun to Partial Shade

Light Shade


Seed is poisonous if ingested

Parts of plant are poisonous if ingested

Bloom Color:


Bloom Time:

Mid Spring

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Mid Fall

Late Fall/Early Winter


Grown for foliage


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 seed; stratify if sowing indoors

From seed; sow indoors before last frost

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds

Properly cleaned, seed can be successfully stored


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

Elk Grove, California

Cincinnati, Ohio

Dundee, Ohio

Lafayette, Tennessee

Brazoria, Texas

Freeport, Texas

Plano, Texas

Shepherd, Texas

show all

Gardeners' Notes:


On Sep 19, 2005, Texasbloomer from Plano, TX wrote:

Wonderful vine. I started very late, in a huge pot; it is over the wall and started blooming late Aug. Only 3-4 blooms a day but so pretty. Mine are the same as the photos from OhioB and QueenB. 6' and vine is super healthy.
Will start e a r l i e r next year!
Lovely bloom; different color from most deep shades.


On Jun 28, 2005, QueenB from Shepherd, TX (Zone 8b) wrote:

The flowers are absolutely gorgeous, but because they're so big and heavy, they're prone to get beat up by the slightest breeze, and will stick to leaves and other objects very easily. It also has a tendency to flop over under it's own weight. The best time to view this one is early in the morning when it opens before it gets abused!


On Sep 14, 2004, OhioBreezy from Dundee, OH (Zone 5b) wrote:

Very pretty purple in color, also very delicate bloom!! Shelter this one from the wind if you want to see a fully nice bloom