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Japanese Morning Glory 'Heian no Izumi'

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 Izumi



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


10-12 ft. (3-3.6 m)


3-6 in. (7-15 cm)


Not Applicable

Sun Exposure:

Full Sun

Sun to Partial Shade

Light Shade


Seed is poisonous if ingested

Bloom Color:

Magenta (Pink-Purple)

Bloom Time:

Blooms repeatedly




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; stratify if sowing indoors

From seed; direct sow after last frost

From seed; germinate in a damp paper towel

Scarify seed before sowing

By grafting

By air layering

Seed Collecting:

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

Properly cleaned, seed can be successfully stored


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

Elk Grove, California

Wilmington, Delaware

Dundee, Ohio

Lafayette, Tennessee

Lake City, Tennessee

Brazoria, Texas

Freeport, Texas

Plano, Texas

Franklin, Wisconsin

show all

Gardeners' Notes:


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

One of my tough favorites. Started in a pot in April. set outside in May. Got to 10" or so. Bunnies chewed it all the way down. I cried. Doctored it for a month. Then it began to grow. Planted in ground late June. Only 5 of 8 seeds germiniated originally. It is 7' or so. First blooms mid-Aug. Everyday since, there's a dozen or more lavender blooms, though the vine is very very thin. Some bloom at ground, some over the wall. SO beautiful. LARGE 6" blooms but touch, to wind, to rain. Luckily more come each day. Love the lilac color.


On May 30, 2004, WillowWasp from Jones Creek, TX (Zone 9a) wrote:

Beautiful large pale lavender blooms, about 4 and a half to 6 inches across, with large varigated tri lobed leaves. Blooms stay open all day with full noon day sun. It is in morning and evening shade and has full sun midday. Bloomed from bottom to top with seed pods begining to form about mid way up the vine. The bottom blooms did not produce seed pods.
Blooms are very likely to tear, due to wind or rain as they are thin and quite large.
Color on this flower seems to be completely pale lavender from throat to tip with a very slight color change in the throat but hardley noticeable. On most blooms I notice no color variation at all.