Purpletop tridens (Tridens flavus)

Purpletop tridens

Also known as: Purpletop, Redtop Tridens, Sandgrass

Purpletop tridens, also known as Grease Grass, is a bunching grass often found along roadsides and is very tolerant of road salt. When planted en masse, the purple seed heads look stunning. The purple seed heads are covered in a greasy substance, giving it its name.

Scientific classification

Species

Purpletop tridens (Tridens flavus)

Grasses, sedges and allies

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Perennial

Lifespan

Herb

Plant Type

Summer, Fall

Bloom Time

Fall

Harvest Time

91 cm to 1.5 m

Plant Height

Purple, Yellow, Brown, Cream, Red, Lavender, Gold

Flower Color

Deciduous

Leaf type

5 - 35 ℃

Ideal Temperature

Moderate

Growth Rate

Images of Purpletop tridens

Attributes of Purpletop tridens

Growth Rate

During its summer growth season, purpletop tridens exhibits a moderate growth rate, leading to steady increases in height and leaf production. This growth speed encourages the formation and maturation of its characteristic purplish seed-heads. Slight variations may be noticed in other seasons, but summer prompts the most active and visible growth.

Distribution of Purpletop tridens

Distribution Map

Purpletop tridens is native to North America, with its presence notably established in the eastern and central regions of the continent. This grass has spread beyond its natural range, adapting to diversified environments across various parts of the Americas.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Pine and oak woodlands

Hemisphere Trend Curve

Northern

Sorthern

Quickly Identify Purpletop tridens

Distinctive reddish-purple seed heads in late summer/fall

Purple panicles of spikelets, up to 20 inches (50 cm) long

Small, dry caryopsis fruits, tan to brown, less than 0.1 inches (2.5 mm)

Linear green leaves, up to 16 inches (40 cm) long and 10 mm (0.4 inches) wide

Clumping growth habit with a sheathed appearance

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Care Guide for Purpletop tridens

Every week

Water

Full sun

Sunlight

5 - 35 ℃

Ideal Temperature

Water: Purpletop tridens thrives in grasslands with moderate drought tolerance. Regular weekly watering supports its growth, benefiting from natural rainwater in suitable regions. Its vitality is enhanced by seasonal rains that align with its preferred watering schedule.

Fertilize: Purpletop tridens thrives with balanced fertilizers applied in spring and mid-summer. Light applications prevent harm, while seasonal growth variations may increase frequency. Always water after fertilizing and avoid late fall fertilization to protect against frost. Follow package instructions for optimal health.

Pruning: Purpletop tridens features tall purplish flower spikes and thrives with early spring pruning. Trim dead stems to boost growth and remove spent blooms to limit seed spread. Using clean tools ensures optimal health and ornamental appeal while also controlling spread.

Propagation: To cultivate purpletop tridens, propagate through division in spring or early summer by separating clumps with roots. Transplant divisions into well-prepared, moist soil to promote successful establishment and root development.

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Images of Purpletop tridens

Attributes of Purpletop tridens

Distribution of Purpletop tridens

Quickly Identify Purpletop tridens

Care Guide for Purpletop tridens

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