Roundhead buckwheat Plant Care
Eriogonum sphaerocephalum Douglas ex Benth.
Updated · Sources · How we source care data
Eriogonum sphaerocephalum is a species of wild buckwheat known by the common names rock buckwheat and round-headed desert buckwheat. It is native to the western United States.
Every 7–14 days
Full sun
50–90°F
20–60%
At a glance
How do you care for Roundhead buckwheat?
Water Roundhead buckwheat every 7–14 days, letting the top layer of soil dry out between waterings, and give it full sun. It prefers temperatures of 50–90°F (10–32°C) and 20–60% humidity.
Where Is the Roundhead buckwheat Native To?
What Is the Roundhead buckwheat?
Roundhead buckwheat (Eriogonum sphaerocephalum) belongs to the Polygonaceae family within the Eriogonum genus. Roundhead buckwheat is native to the western United States.
Roundhead buckwheat displays a low mounding perennial growth habit, reaching up to 1 ft tall with a spread of approximately 2 ft. Roundhead buckwheat produces small clusters of tiny white, pink, or yellow flowers.
Leaf size: approximately 2 inches.
How Often Should You Water a Roundhead buckwheat?
Eriogonum sphaerocephalum 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.
Watering Frequency
Every 7–14 days
Let soil partially dry between waterings
What Light Does the Roundhead buckwheat Need?
Roundhead buckwheat thrives in full sun.
Light Requirement
Full sun
What Temperature and Humidity Does the Roundhead buckwheat Prefer?
Eriogonum sphaerocephalum grows best at temperatures of 50–90°F. Roundhead buckwheat prefers humidity levels of 20–60%.
Temperature
50–90°F
Humidity
20–60%
What Soil Mix Works Best for a Roundhead buckwheat?
Well-draining sandy or gravelly soil with low fertility. Good drainage is essential for Roundhead buckwheat to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Roundhead buckwheat?
Repot every 3-4 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 Roundhead buckwheat?
Roundhead buckwheat can be propagated through seeds, division. Similar propagation techniques also apply to nodding buckwheat plant care, which shares the same genus.
Is the Roundhead buckwheat Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Roundhead buckwheat, 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 Roundhead buckwheat?
Roundhead buckwheat is susceptible to aphids, spider mites. 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 Roundhead buckwheat Need?
Roundhead buckwheat grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Roundhead buckwheat is native to the western United States. In cooler regions, grow Roundhead buckwheat as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Roundhead buckwheat 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 Eriogonum genus — compare its care with other Eriogonum species on PlantoScan.
Eriogonum is part of the Polygonaceae plant family — browse all Polygonaceae genera and species.
Roundhead buckwheat thrives in bright light and direct sun — see other bright-light plants.
More Eriogonum Species
Other Eriogonum species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Eriogonum sphaerocephalum Douglas ex Benth., family Polygonaceae (first published in Trans. Linn. Soc. London 17: 407 (1836)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Roundhead buckwheat, 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 12a, 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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