Actinidia, Bower Actinidia, Hardy Kiwi, Tara Vine, Yang Tao 'Issai'

Actinidia arguta

Family: Actinidiaceae (ak-tin-id-ee-AY-see-ee) (Info)
Genus: Actinidia (ak-tih-NID-ee-uh) (Info)
Species: arguta (ar-GOO-tuh) (Info)
Cultivar: Issai


Vines and Climbers

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Full Sun



Foliage Color:

Unknown - Tell us


12-15 ft. (3.6-4.7 m)

15-20 ft. (4.7-6 m)

20-30 ft. (6-9 m)


8-10 ft. (2.4-3 m)


USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Where to Grow:

Unknown - Tell us



Bloom Color:

White/Near White

Bloom Characteristics:

Unknown - Tell us

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Spring/Early Summer

Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Unknown - Tell us

Propagation Methods:

From softwood cuttings

From semi-hardwood cuttings

By grafting

Seed Collecting:

Allow unblemished fruit to ripen; clean and dry seeds


This plant is said to grow outdoors in the following regions:

Richmond, California

Santa Rosa, California

Fort Mc Coy, Florida

Tiger, Georgia

Indianapolis, Indiana

Pylesville, Maryland

Saint Clair Shores, Michigan

Kannapolis, North Carolina

Tillamook, Oregon

Wilkes Barre, Pennsylvania

South Jordan, Utah

Marysville, Washington

Mukilteo, Washington

North Sultan, Washington

Renton, Washington

Sultan, Washington

show all

Gardeners' Notes:


On Aug 17, 2017, janelp_lee from Toronto, ON (Zone 6a) wrote:

Self-pollinate variety. You only need one plant and will flower and fruit. Not hard to propagate by cuttings. Cold hardy.


On May 14, 2013, nathanieledison from Santa Rosa, CA (Zone 9b) wrote:

I don't have a ton of experience with this vine, but it always has blackened sick-looking leaves until the deciduous tree above it blocks out the sun, and then it looks beautiful and flourishes. In hot dry areas it appears to be more of a part-shade plant. Move it (if you can) into some shade and see what happens. Good luck all!


On Aug 21, 2011, PermaCycle from Indianapolis, IN (Zone 5b) wrote:

About comments regarding blackening of leaves and blossom rot, I would start with a soil test to check your soil's pH, as there can be several reasons this is happening. The blackening also indicates perhaps there is some root rot going on and you may want to insure that the soil is properly draining. If not, replant your vine and raise its position a foot above the current soil level. Use some crushed granite in the mix to promote better aeration as well as drainage. First, however, we know that this plant grows better in slightly acidic to moderately alkaline soil . Secondly, the plant is not self-fertile and thus requires fertilizing at least twice per year: in early spring (NKP+C) and early summer (triple phosphate+C). To moderately change your soil's pH, try putting down a layer of oa... read more


On Jun 30, 2011, ergick from Renton, WA wrote:

I have had my plant for about 7 years. Live in Renton Wa and the plant flowers great but the stems turn black every year and the blossems fall off. Can anyone tell me why?


On Jun 9, 2008, nicjw from Tooele, UT wrote:

hady to-35
Subject: actinidia-arguta-issai

I live in zone 6b Utah
I got this plant last year and all the leaves turnd black and died back to base. I didn't over water, the plant was in full sun! i also had a cherry tomato planted next to it (touching leaves)
and it did't have the prob transfer! I know I'm not the first to have this prob. but no one has an answer yet. please help!
I got one more this year to try again I havn't even taken it out of the pot yet and the same prob showed up! again please help thanks,


On Jan 22, 2007, sladeofsky from Louisville, KY (Zone 6b) wrote:

This is a female cultivar. Issai is reported to produce up to 100 lbs of fruit in one season.


On Jan 21, 2007, Chills from Saint Clair Shores, MI (Zone 6b) wrote:

I have had this plant for 4 years now and it grows well (but it does lose out late in the season to Sweet Autumn Clematis, so its not as rambunctious as that climber). I have yet to have it bloom or fruit.

Most varieties of this vine are either male or female and one of each is required for fruit (though one male can service as many as 8 females)

Pruning should not be done in early spring as the plant has the habit of excessive bleeding and the plant requires even moisture and cannot sit in standing water.

I'm hoping this year to get fruit (3-5 years is the norm).

The fruit is reported to be like other kiwi, but fuzzless and sweeter.


On Apr 6, 2006, renwings from Sultan, WA (Zone 8a) wrote:

Purchased this plant at our local nursery and will post here the information I have gleaned for this culitivar and edit this post later with my observations. I am training it to grow on a bamboo teepee that is 12 ft. tall.

"This cultivar from Japan is apparently a hybrid of Actinidia arguta. It is distinctly different in appearance and behavior from other A. argutas. A self-pollinator, it bears long fruit to 1 3/4" in length. Often bears fruit the year after planting. Much less vigorous than other A. arguta cultivars (this can be an advantage where space is limited). Hardy to about -15F, but sometimes injured at higher temperatures. Has not been reliably hardy here. Capable of pollinating other A. argutas, but blossoms relatively late, so it is probably effective as a po... read more