Photo by Melody

PlantFiles: White Guinea Yam
Dioscorea rotundata

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

3 members have or want this plant for trade.

Vines and Climbers

30-40 ft. (9-12 m)

18-24 in. (45-60 cm)
24-36 in. (60-90 cm)

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

Parts of plant are poisonous if ingested

Bloom Color:
Unknown - Tell us

Bloom Time:
Unknown - Tell us


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

Click thumbnail
to view:

By Michaelp
Thumbnail #1 of Dioscorea rotundata by Michaelp

By Michaelp
Thumbnail #2 of Dioscorea rotundata by Michaelp

By Michaelp
Thumbnail #3 of Dioscorea rotundata by Michaelp

By Michaelp
Thumbnail #4 of Dioscorea rotundata by Michaelp


1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive Michaelp 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 roots, the 1 year roots averaged 3lbs .I dug some of the second year plants and they were about 10 lbs each. -Nov/2005-some roots have exceded 20 pounds.


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

Orange Springs, Florida

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