Andropogon gerardii

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Andropogon gerardii Vitman

Poaceae

Life form: grass

Exposure: sun   4

Moisture: moderately moist

Soil: sandy loam - Soil: gritty loam - Soil: sandy clay

Arrangement: alternate
Leaves: decidious

Shape: linear

Division: simple

Shape: not specified
Fruit: caryopsis

3A / f8da21 

Inflorescence: spike

Petals: single
Habit: not specified

Growth form: stemless

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Liliopsida
Subclassis:
Commelinidae
Superordo:
Poanae
Ordo:
Poales

Andropogon gerardii is a grass.

Naming

Andropogon gerardii was described by Fulgenzio Vitman in 1792. The name is considered as validly published.

Taxonomy

Andropogon gerardii is a species in the genus Andropogon which contains approximately 127 to 195 species and belongs to the family of the Poaceae (Grass Family).

Characteristics

Growth

The comparatively long-lived grasses have a erect habit and have an upright habit. They reach heights of 1,8 to 2 metres and spread slowly. The main growing season is in summer. The plants reach a width of 0.5 to 1 metres.

Leaves

Andropogon gerardii is deciduous. The fern-green, simple leaves are alternate. They are linear with entire margins and parallel venation. The foliage is dense in summer and porous in winter.

Flowers and Fruits

Andropogon gerardii produces spikes of yellow flowers from June to September.

The grasses produce ornamental brown caryopses from summer to autumn.

Root System

The plants form fibrous roots.

Distribution

Andropogon gerardii is native to North America.

Cultivation

The grasses prefer a sunny situation on moderately moist soil. The substrate should be sandy-loamy, gritty-loamy or sandy clay and comparatively poor with a pH between 6 and 7,5. The plants need a soil depth of at least 51 centimetres for good growth. They tolerate temperatures down to -35°C (USDA zone 4) and need a frost-free period of at least 22 weeks.

Classification after Prof. Dr. Sieber

  • flower beds (rich soil)

Tolerance of special soil conditions

  • medium: soil salinity, anaerobic soil
  • high: drought, calcareous soil, city climate

Uses

The recommended planting distance is 40 to 50 centimetres, the grasses are best planted in groups of 3 to 5.

Maintenance and Propagation

The plants need little to no maintenance if grown under suitable conditions.

Propagate by sowing.

Cultivars

Pests and Diseases

Literature

  • Walter Erhardt, Erich Götz, Nils Bödeker, Siegmund Seybold: Der große Zander. Eugen Ulmer KG, Stuttgart 2008, ISBN 978-3-8001-5406-7. (Ger.)
  • Christoper Brickell (Editor-in-chief): RHS A-Z Encyclopedia of Garden Plants. Third edition. Dorling Kindersley, London 2003, ISBN 0-7513-3738-2.

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