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Indiangrass

Sorghastrum nutans · Poaceae

The gardener's calendar

The right move for September

Ideal time to plant indiangrass: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

JFMAMJJASOND Planting

ID card

Foliage
Deciduous
Flowering
August to October
Adult size
1.5 to 2 m tall
Growth
Medium to fast
Hardiness
Down to -20 °C
Origin
North America
Soil type
Well-drained, tolerates poor soils

Care

Sunlight

Plant your false sorghum in full sun for optimal growth and abundant flowering. This ornamental grass tolerates heat well and thrives in south or west-facing positions. Partial shade is possible but will reduce the plant's vigor.

Watering

Water regularly during the first year of establishment to encourage root development. Once well-established, false sorghum becomes very drought-tolerant and requires little to no supplemental watering. Avoid excess moisture in winter.

Soil and drainage

False sorghum prefers well-drained soil and readily accepts poor or calcareous soils. Adequate drainage is crucial to prevent root rot. Soil amendment is generally unnecessary.

Trimming and cutting

Cut the grass back to ground level in late winter or early spring, before growth resumes. The dry stems add ornamental interest in autumn and winter; leave them if you want to enjoy this effect. Use a hedge trimmer or pruners depending on the area.

Fertilizer

False sorghum generally doesn't require regular fertilizing. A light mineral application in spring can stimulate growth on very poor soils. Avoid excess nitrogen, which would promote foliage at the expense of flowering.

Pests and diseases

This ornamental grass is very hardy and rarely susceptible to disease. Main problems result from insufficient drainage. In humid conditions, watch for root rot and improve air circulation.

Did you know?

Drooping false sorghum is a North American ornamental grass that was long overlooked in European gardens but has been rediscovered in recent decades by landscape designers for its architectural beauty and ecological role. Its fine, slender seed heads attract seed-eating birds in autumn, making it a valuable plant for wildlife.

Where to buy it

Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.

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Tips generated and checked by Viridia — adapt them to your local climate.