Richweed Plant Care
Collinsonia glandulosa (C.Y.Wu) Harley
Updated · Sources · How we source care data
This plant is easily recognizable by its large, heart-shaped leaves with serrated edges. Collinsonia glandulosa is native to rich woods and slopes in the southeastern United States. Plant collectors are drawn to its unique foliage and charming clusters of yellow flowers that bloom in late summer.
Every 5–7 days
Partial shade to full sun
50–80°F
40–70%
At a glance
How do you care for Richweed?
Water Richweed every 5–7 days, letting the top layer of soil dry out between waterings, and give it partial shade to full sun. It prefers temperatures of 50–80°F (10–27°C) and 40–70% humidity. Fertilize it every 6 months during the growing season.
What Is the Richweed?
Richweed (Collinsonia glandulosa) belongs to the Lamiaceae family within the Collinsonia genus. Richweed is native to Eastern United States. Richweed is also known as Horsebalm.
Richweed displays an upright, spreading perennial growth habit, reaching up to 2.5 ft tall with a spread of approximately 1.5 ft. Richweed produces small tubular flowers in shades of white, pink, or purple.
Leaf size: approximately 4 inches.
How Often Should You Water a Richweed?
Collinsonia glandulosa requires watering every 5–7 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 5–7 days
Let soil partially dry between waterings
What Light Does the Richweed Need?
Richweed thrives in partial shade to full sun.
Light Requirement
Partial shade to full sun
What Temperature and Humidity Does the Richweed Prefer?
Collinsonia glandulosa grows best at temperatures of 50–80°F. Richweed prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Richweed?
Well-draining loamy soil with added organic matter for moisture retention. Good drainage is essential for Richweed to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Richweed?
Feed Richweed every 6 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 6 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 Richweed?
Repot 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.
How Do You Propagate a Richweed?
Richweed can be propagated through seeds, division of clumps, stem cuttings. Similar propagation techniques also apply to richweed plant care, which shares the same genus.
Is the Richweed Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Richweed, 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 Richweed?
Richweed is susceptible to aphids, spider mites, whiteflies. 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 Richweed Need?
Richweed grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Richweed is native to Eastern United States. In cooler regions, grow Richweed as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Richweed 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 Collinsonia genus — compare its care with other Collinsonia species on PlantoScan.
Collinsonia is part of the Lamiaceae plant family — browse all Lamiaceae genera and species.
Richweed thrives in bright light and direct sun — see other bright-light plants.
More Collinsonia Species
Other Collinsonia species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Collinsonia glandulosa (C.Y.Wu) Harley, family Lamiaceae (first published in Kew Bull. 58: 486 (2003)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Richweed, 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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