Cottony Buckwheat Plant Care
Eriogonum gossypinum Curran
Updated · Sources · How we source care data
Eriogonum gossypinum is an uncommon species of wild buckwheat known by the common name cottony buckwheat. It is endemic to California, where it is known from the southern Central Valley and some of the adjacent foothills.
Every 7–14 days
Full sun
50–90°F
20–60%
At a glance
How do you care for Cottony Buckwheat?
Water Cottony 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 Cottony Buckwheat Native To?
What Is the Cottony Buckwheat?
Cottony Buckwheat (Eriogonum gossypinum) belongs to the Polygonaceae family within the Eriogonum genus. Cottony Buckwheat is native to California.
Cottony Buckwheat displays a low mounding perennial growth habit, reaching up to 1 ft tall with a spread of approximately 2 ft. Cottony Buckwheat produces small clusters of tiny white, pink, or yellow flowers.
Leaf size: approximately 2 inches.
How Often Should You Water a Cottony Buckwheat?
Eriogonum gossypinum 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 Cottony Buckwheat Need?
Cottony Buckwheat thrives in full sun.
Light Requirement
Full sun
What Temperature and Humidity Does the Cottony Buckwheat Prefer?
Eriogonum gossypinum grows best at temperatures of 50–90°F. Cottony Buckwheat prefers humidity levels of 20–60%.
Temperature
50–90°F
Humidity
20–60%
What Soil Mix Works Best for a Cottony Buckwheat?
Well-draining sandy or gravelly soil with low fertility. Good drainage is essential for Cottony Buckwheat to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Cottony 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 Cottony Buckwheat?
Cottony Buckwheat can be propagated through seeds, division. Similar propagation techniques also apply to nodding buckwheat plant care, which shares the same genus.
Is the Cottony Buckwheat Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Cottony 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 Cottony Buckwheat?
Cottony 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 Cottony Buckwheat Need?
Cottony Buckwheat grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Cottony Buckwheat is native to California. In cooler regions, grow Cottony Buckwheat as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Cottony 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.
Cottony 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 gossypinum Curran, family Polygonaceae (first published in Bull. Calif. Acad. Sci. 1(4): 274 (1885)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Cottony 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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