Photo: Cal WoodCC BY 4.0via iNaturalistresized / cropped
Oldfield's quoya Plant Care
Quoya oldfieldii (F.Muell.) B.J.Conn & Henwood
Updated · Sources · How we source care data
Quoya oldfieldii is easily recognized by its striking turquoise-blue leaves, a rare color in the plant world. Originating from the deserts of Western Australia, this unique plant is highly sought after by collectors for its unusual appearance and ability to thrive in hot, arid conditions.
Every 7–10 days
Full sun to partial shade
60–80°F
40–70%
At a glance
How do you care for Oldfield's quoya?
Water Oldfield's quoya 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 60–80°F (16–27°C) and 40–70% humidity. Fertilize it every 6 months during the growing season.
Where Is the Oldfield's quoya Native To?
What Is the Oldfield's quoya?
Oldfield's quoya (Quoya oldfieldii) belongs to the Lamiaceae family within the Quoya genus. Oldfield's quoya is native to the south-west of Western Australia.
Oldfield's quoya displays a compact, spreading perennial growth habit, reaching up to 1.5 ft tall with a spread of approximately 2 ft. Oldfield's quoya produces small, tubular purple flowers in dense spikes.
Leaf size: approximately 2 inches.
How Often Should You Water a Oldfield's quoya?
Quoya oldfieldii 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 Oldfield's quoya Need?
Oldfield's quoya thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Oldfield's quoya Prefer?
Quoya oldfieldii grows best at temperatures of 60–80°F. Oldfield's quoya prefers humidity levels of 40–70%.
Temperature
60–80°F
Humidity
40–70%
What Soil Mix Works Best for a Oldfield's quoya?
Well-draining loamy soil with added compost for nutrients. Good drainage is essential for Oldfield's quoya to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Oldfield's quoya?
Feed Oldfield's quoya 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 Oldfield's quoya?
Repot every 1-2 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 Oldfield's quoya?
Oldfield's quoya can be propagated through softwood cuttings, division of root ball. Similar propagation techniques also apply to quoya atriplicina plant care, which shares the same genus.
Is the Oldfield's quoya Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Oldfield's quoya, 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 Oldfield's quoya?
Oldfield's quoya 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 Oldfield's quoya Need?
Oldfield's quoya grows outdoors in USDA Zone 9b – 11a. It survives winters down to planting zone 9b. Oldfield's quoya is native to the south-west of Western Australia. In cooler regions, grow Oldfield's quoya as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 9b – 11a
Keep exploring plants
Oldfield's quoya 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 Quoya genus — compare its care with other Quoya species on PlantoScan.
Quoya is part of the Lamiaceae plant family — browse all Lamiaceae genera and species.
Oldfield's quoya thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Quoya oldfieldii (F.Muell.) B.J.Conn & Henwood, family Lamiaceae (first published in Austral. Syst. Bot. 24: 8 (2011)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Oldfield's quoya, 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.
- Photo: Cal Wood, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 9b – 11a, estimated from the plant's typical growing conditions.
- 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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