Gamba grass Plant Care

Gamba grass (Andropogon gayanus) belongs to the Poaceae family within the Andropogon genus. Gamba grass is native to most of the tropical and subtropical savannas of Africa. Gamba grass is also known as Rhodes grass.

Gamba grass displays a clumping grass growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Gamba grass produces tight, spike-like inflorescences.

Leaf size: approximately 12 inches.

Andropogon gayanus requires watering every 7–14 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

Gamba grass thrives in full sun.

Andropogon gayanus grows best at temperatures of 60–85°F. Gamba grass prefers humidity levels of 40–70%.

Well-draining sandy loam with good organic content. Good drainage is essential for Gamba grass to prevent waterlogging, which leads to root rot and fungal issues.

Feed Gamba grass every 8 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.

Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Divide and repot clumps every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

Gamba grass can be propagated through division, seeds. Similar propagation techniques also apply to big bluestem plant care, which shares the same genus.

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Gamba grass is susceptible to grasshoppers, aphids, cutworms. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Gamba grass grows outdoors in USDA Zone 9b – 11b. It survives winters down to planting zone 9b. Gamba grass is native to most of the tropical and subtropical savannas of Africa. In cooler regions, grow Gamba grass as a houseplant or bring it indoors before the first frost.