White Guinea Yam
Dioscorea rotundata

Family: Dioscoreaceae
Genus: Dioscorea (dy-oh-SKOR-ee-uh) (Info)
Species: rotundata (roh-tun-DAY-tuh) (Info)

Category:

Vegetables

Vines and Climbers

Height:

30-40 ft. (9-12 m)

Spacing:

18-24 in. (45-60 cm)

24-36 in. (60-90 cm)

Hardiness:

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:

Full Sun

Sun to Partial Shade

Light Shade

Danger:

Parts of plant are poisonous if ingested

Bloom Color:

Unknown - Tell us

Bloom Time:

Unknown - Tell us

Foliage:

Herbaceous

Smooth-Textured

Shiny/Glossy-Textured

Other details:

May be a noxious weed or invasive

Average Water Needs; Water regularly; do not overwater

Requires consistently moist soil; do not let dry out between waterings

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:

By dividing the rootball

By dividing rhizomes, tubers, corms or bulbs (including offsets)

From herbaceous stem cuttings

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Regional

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

Orange Springs, Florida

Gardeners' Notes:

1
positive
0
neutrals
0
negatives
RatingContent
Positive

On Oct 8, 2002, Michaelp from Glendale, UT (Zone 5a) wrote:

This plant grows fast and looks nice /Tubers compact spherical or cylindrical light brown on outside white /cream and yellow fleshed/stems are smooth/this var. does produce airial tubers, and can be propagated by planting the smaller tubers to small to sell or eat,or cuting the top off the big ones ,planting that and eating the bottom.I have had some success rooting stem cuttings-should be mulched to protect from extreems,[excess heat, cold ,or moisture loss/prefers rich well drained soil/needs to be kept moist all summer/must be protected from frost/can be brought in and stored, warm and dry for the winter.excelent eating quality./must be cooked to destroy toxin.also grows well in large tubs of mulch,and these can be taken inside for winter.
2/8/04-I just dug up some of the root... read more