Sweetgrass Plant Care
Sorghum versicolor Andersson
Updated · Sources · How we source care data
Every 3–7 days
Full sun
70–90°F
40–60%
At a glance
How do you care for Sweetgrass?
Water Sweetgrass every 3–7 days, letting the top layer of soil dry out between waterings, and give it full sun. It prefers temperatures of 70–90°F (21–32°C) and 40–60% humidity. Fertilize it every 4 months during the growing season.
What Is the Sweetgrass?
Sweetgrass (Sorghum versicolor) belongs to the Poaceae family within the Sorghum genus. Sweetgrass is also known as Sweet sorghum.
Sweetgrass displays a tall, upright grass growth habit, reaching up to 8 ft tall with a spread of approximately 0.5 ft. Sweetgrass produces tall, feathery flower spikes.
Leaf size: approximately 24 inches.
How Often Should You Water a Sweetgrass?
Sorghum versicolor requires watering every 3–7 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 3–7 days
Let soil partially dry between waterings
What Light Does the Sweetgrass Need?
Sweetgrass thrives in full sun.
Light Requirement
Full sun
What Temperature and Humidity Does the Sweetgrass Prefer?
Sorghum versicolor grows best at temperatures of 70–90°F. Sweetgrass prefers humidity levels of 40–60%.
Temperature
70–90°F
Humidity
40–60%
What Soil Mix Works Best for a Sweetgrass?
Well-draining loamy soil with good fertility. Good drainage is essential for Sweetgrass to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Sweetgrass?
Feed Sweetgrass every 4 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.
Fertilizing
Every 4 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Sweetgrass?
Repot every 1-2 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.
How Do You Propagate a Sweetgrass?
Sweetgrass can be propagated through seeds. Similar propagation techniques also apply to reed sorghum plant care, which shares the same genus.
Is the Sweetgrass Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Sweetgrass, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Sweetgrass?
Sweetgrass is susceptible to aphids, grasshoppers, 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.
What USDA Hardiness Zone Does the Sweetgrass Need?
Sweetgrass grows outdoors in USDA Zone 13b. It survives winters down to planting zone 13b. In cooler regions, grow Sweetgrass as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13b
Keep exploring plants
Sweetgrass is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Sorghum genus — compare its care with other Sorghum species on PlantoScan.
Sorghum is part of the Poaceae plant family — browse all Poaceae genera and species.
Sweetgrass thrives in bright light and direct sun — see other bright-light plants.
More Sorghum Species
Other Sorghum species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Sorghum versicolor Andersson, family Poaceae (first published in Naturw. Reise Mossambique 6(2): 563 (1864)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Sweetgrass, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 13b, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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