Lemmon's yampah Plant Care
Perideridia lemmonii (J.M.Coult. & Rose) T.I.Chuang & Constance
Updated · Sources · How we source care data
Perideridia lemmonii is a species of flowering plant in the family Apiaceae known by the common names Lemmon's yampah and tuni. It is native to the western United States, where it is known from southeastern Oregon, western Nevada, and the mountains of eastern California.
Every 7–10 days
Full sun to partial shade
50–80°F
40–70%
At a glance
How do you care for Lemmon's yampah?
Water Lemmon's yampah every 7–10 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–80°F (10–27°C) and 40–70% humidity. Fertilize it every 6 months during the growing season.
Where Is the Lemmon's yampah Native To?
What Is the Lemmon's yampah?
Lemmon's yampah (Perideridia lemmonii) belongs to the Apiaceae family within the Perideridia genus. Lemmon's yampah is native to the western United States. Lemmon's yampah is also known as Yampah.
Lemmon's yampah displays an upright, clumping perennial growth habit, reaching up to 1.5 ft tall with a spread of approximately 1 ft. Lemmon's yampah produces small white or pink umbels.
Leaf size: approximately 6 inches.
How Often Should You Water a Lemmon's yampah?
Perideridia lemmonii requires watering every 7–10 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 7–10 days
Let soil partially dry between waterings
What Light Does the Lemmon's yampah Need?
Lemmon's yampah thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Lemmon's yampah Prefer?
Perideridia lemmonii grows best at temperatures of 50–80°F. Lemmon's yampah prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Lemmon's yampah?
Well-draining sandy loam with good organic content. Good drainage is essential for Lemmon's yampah to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Lemmon's yampah?
Feed Lemmon's yampah 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 Lemmon's yampah?
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 Lemmon's yampah?
Lemmon's yampah can be propagated through seeds, division of rhizomes. Similar propagation techniques also apply to yampah plant care, which shares the same genus.
Is the Lemmon's yampah Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Lemmon's yampah, 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 Lemmon's yampah?
Lemmon's yampah is susceptible to aphids, caterpillars, 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 Lemmon's yampah Need?
Lemmon's yampah grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Lemmon's yampah is native to the western United States. In cooler regions, grow Lemmon's yampah as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Lemmon's yampah 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 Perideridia genus — compare its care with other Perideridia species on PlantoScan.
Perideridia is part of the Apiaceae plant family — browse all Apiaceae genera and species.
Lemmon's yampah thrives in bright light and direct sun — see other bright-light plants.
More Perideridia Species
Other Perideridia species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Perideridia lemmonii (J.M.Coult. & Rose) T.I.Chuang & Constance, family Apiaceae (first published in Univ. Calif. Publ. Bot. 55: 63 (1969)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Lemmon's yampah, 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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