Pacific Poison Oak Plant Care
Toxicodendron diversilobum Greene
Updated · Sources · How we source care data
Toxicodendron diversilobum, commonly named Pacific poison oak or western poison oak, is a woody vine or shrub in the sumac family, Anacardiaceae.
Full sun to partial shade
At a glance
How do you care for Pacific Poison Oak?
Plant Pacific Poison Oak in full sun to partial shade.
What Is the Pacific Poison Oak?
Pacific Poison Oak (Toxicodendron diversilobum) belongs to the Anacardiaceae family within the Toxicodendron genus. Pacific Poison Oak is also known as Western Poison Oak.
Pacific Poison Oak displays a vining, sprawling shrub growth habit, reaching up to tall with a spread of approximately . Pacific Poison Oak produces small greenish-white flowers in clusters.
What Light Does the Pacific Poison Oak Need?
Pacific Poison Oak thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Soil Mix Works Best for a Pacific Poison Oak?
Well-draining sandy soil with high organic content. Good drainage is essential for Pacific Poison Oak to prevent waterlogging, which leads to root rot and fungal issues.
Where Should You Plant a Pacific Poison Oak?
Choose a spot with full sun to partial shade and well-draining sandy soil with high organic content. Avoid low spots where water collects after rain.
Plant container-grown or balled-and-burlapped shrubs in spring or early autumn, setting the root flare at soil level, and water well after planting.
How Do You Prune a Pacific Poison Oak?
Prune Pacific Poison Oak while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.
If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the shrub in one year.
How Do You Care for a Pacific Poison Oak in Winter?
Water deeply in late autumn before the ground freezes, and spread a 5–8 cm (2–3 in) layer of mulch over the root zone, keeping it away from the trunk.
Young and container-grown shrubs need extra protection: roots in a pot freeze much more easily than roots in the ground.
How Do You Propagate a Pacific Poison Oak?
Pacific Poison Oak can be propagated through seeds, root cuttings. Similar propagation techniques also apply to poison ivy plant care, which shares the same genus.
Is the Pacific Poison Oak Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Pacific Poison Oak, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
It may also be harmful to people if eaten.
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 Pacific Poison Oak?
Pacific Poison Oak is susceptible to aphids, spider mites, scale insects. 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.
Keep exploring plants
Pacific Poison Oak 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 Toxicodendron genus — compare its care with other Toxicodendron species on PlantoScan.
Toxicodendron is part of the Anacardiaceae plant family — browse all Anacardiaceae genera and species.
Pacific Poison Oak thrives in bright light and direct sun — see other bright-light plants.
More Toxicodendron Species
Other Toxicodendron species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Toxicodendron diversilobum Greene, family Anacardiaceae (first published in Leafl. Bot. Observ. Crit. 1: 119 (1905)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Pacific Poison Oak, 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.
- 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.
Identify Plants Like the
Pacific Poison Oak Instantly
Scan any plant with your phone camera and get instant ID, care tips, water and fertilizer reminders, and health checks — all in one app.
Free
to download
iOS & Android
platforms
Light & dark
mode
100,000+
species