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PlantFiles: Purpletop Tridens
Tridens flavus

Family: Poaceae (poh-AY-see-ee) (Info)
Genus: Tridens (TRY-dens) (Info)
Species: flavus (FLA-vus) (Info)

Ornamental Grasses and Bamboo

36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)

Unknown - Tell us

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)
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)

Sun Exposure:
Full Sun
Sun to Partial Shade

Unknown - Tell us

Bloom Color:

Bloom Time:
Late Summer/Early Fall
Mid Fall

Unknown - Tell us

Other details:
Unknown - Tell us

Soil pH requirements:
Unknown - Tell us

Patent Information:

Propagation Methods:
From seed; direct sow outdoors in fall

Seed Collecting:
Unknown - Tell us

Click thumbnail
to view:

By frostweed
Thumbnail #1 of Tridens flavus by frostweed

By crimsontsavo
Thumbnail #2 of Tridens flavus by crimsontsavo

By sueroderus
Thumbnail #3 of Tridens flavus by sueroderus

By sueroderus
Thumbnail #4 of Tridens flavus by sueroderus


No positives
2 neutrals
No negatives

Gardeners' Notes:

Neutral sueroderus On Jan 2, 2011, sueroderus from Bluffton, SC wrote:

Wide light green leaves and very pretty reddish plumes in the fall. This is a medium size grass and a native one. It self sows freely and it is best to cut the plumes before they go to seed, which is a shame as they are great for winter interest.
I am growing this plant in zone 8b.

Neutral frostweed On Nov 17, 2006, frostweed from Josephine, Arlington, TX (Zone 8a) wrote:

Purpletop Tridens, Tridens flavus, is native to Texas and other States.


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

Fountain, Florida
Okatie, South Carolina
Crossville, Tennessee
Arlington, Texas

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