Large-flowered Chinese Houses Plant Care
Collinsia grandiflora Douglas ex Lindl.
Updated · Sources · How we source care data
Collinsia grandiflora is a species of flowering plant in the plantain family known by the common names giant blue eyed Mary and large-flowered collinsia. This wildflower is native to western North America from British Columbia to northern California where it grows in coniferous understory and woodland.
Every 4–7 days
Partial shade to full sun
50–80°F
40–70%
At a glance
How do you care for Large-flowered Chinese Houses?
Water Large-flowered Chinese Houses every 4–7 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.
Where Is the Large-flowered Chinese Houses Native To?
What Is the Large-flowered Chinese Houses?
Large-flowered Chinese Houses (Collinsia grandiflora) belongs to the Plantaginaceae family within the Collinsia genus. Large-flowered Chinese Houses is native to western North America from British Columbia to northern California. Large-flowered Chinese Houses is also known as Great Flowered Blue-eyed Mary.
Large-flowered Chinese Houses displays an upright, clumping perennial growth habit, reaching up to 1.5 ft tall with a spread of approximately 1 ft. Large-flowered Chinese Houses produces tubular flowers in shades of purple, pink, or white.
Leaf size: approximately 2 inches.
How Often Should You Water a Large-flowered Chinese Houses?
Collinsia grandiflora requires watering every 4–7 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 4–7 days
Let soil partially dry between waterings
What Light Does the Large-flowered Chinese Houses Need?
Large-flowered Chinese Houses thrives in partial shade to full sun.
Light Requirement
Partial shade to full sun
What Temperature and Humidity Does the Large-flowered Chinese Houses Prefer?
Collinsia grandiflora grows best at temperatures of 50–80°F. Large-flowered Chinese Houses prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Large-flowered Chinese Houses?
Moist, well-draining soil with high organic content. Good drainage is essential for Large-flowered Chinese Houses to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Large-flowered Chinese Houses?
Feed Large-flowered Chinese Houses 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 Large-flowered Chinese Houses?
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 Large-flowered Chinese Houses?
Large-flowered Chinese Houses can be propagated through seeds. Similar propagation techniques also apply to chinese houses plant care, which shares the same genus.
Is the Large-flowered Chinese Houses Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Large-flowered Chinese Houses, 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 Large-flowered Chinese Houses?
Large-flowered Chinese Houses 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 Large-flowered Chinese Houses Need?
Large-flowered Chinese Houses grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Large-flowered Chinese Houses is native to western North America from British Columbia to northern California. In cooler regions, grow Large-flowered Chinese Houses as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Large-flowered Chinese Houses 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 Collinsia genus — compare its care with other Collinsia species on PlantoScan.
Collinsia is part of the Plantaginaceae plant family — browse all Plantaginaceae genera and species.
Large-flowered Chinese Houses thrives in bright light and direct sun — see other bright-light plants.
More Collinsia Species
Other Collinsia species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Collinsia grandiflora Douglas ex Lindl., family Plantaginaceae (first published in Bot. Reg. 14: t. 1166 (1828)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Large-flowered Chinese Houses, 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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