Gypsum Four O'clock Plant Care
Frasera gypsicola (Barneby) D.M.Post
Updated · Sources · How we source care data
Frasera gypsicola is a species of flowering plant in the gentian family known by the common names Sunnyside green-gentian, Sunnyside elkweed, and Sunnyside frasera. It is native to southeastern Nevada and southwestern Utah in the United States.
Every 7–14 days
Full sun to partial shade
60–75°F
40–70%
At a glance
How do you care for Gypsum Four O'clock?
Water Gypsum Four O'clock every 7–14 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 60–75°F (16–24°C) and 40–70% humidity. Fertilize it every 6 months during the growing season.
Where Is the Gypsum Four O'clock Native To?
What Is the Gypsum Four O'clock?
Gypsum Four O'clock (Frasera gypsicola) belongs to the Gentianaceae family within the Frasera genus. Gypsum Four O'clock is native to southeastern Nevada and southwestern Utah in the United States.
Gypsum Four O'clock displays an upright, clumping perennial growth habit, reaching up to 2.5 ft tall with a spread of approximately 1.5 ft. Gypsum Four O'clock produces showy clusters of small, star-shaped white flowers.
Leaf size: approximately 6 inches.
How Often Should You Water a Gypsum Four O'clock?
Frasera gypsicola requires watering every 7–14 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 7–14 days
Let soil partially dry between waterings
What Light Does the Gypsum Four O'clock Need?
Gypsum Four O'clock thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Gypsum Four O'clock Prefer?
Frasera gypsicola grows best at temperatures of 60–75°F. Gypsum Four O'clock prefers humidity levels of 40–70%.
Temperature
60–75°F
Humidity
40–70%
What Soil Mix Works Best for a Gypsum Four O'clock?
Well-draining, slightly acidic soil with good organic content. Good drainage is essential for Gypsum Four O'clock to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Gypsum Four O'clock?
Feed Gypsum Four O'clock 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 Gypsum Four O'clock?
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 Gypsum Four O'clock?
Gypsum Four O'clock can be propagated through seeds, division of offsets. Similar propagation techniques also apply to white-stemmed green gentian plant care, which shares the same genus.
Is the Gypsum Four O'clock Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Gypsum Four O'clock, 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 Gypsum Four O'clock?
Gypsum Four O'clock is susceptible to aphids, slugs, snails. 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 Gypsum Four O'clock Need?
Gypsum Four O'clock grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Gypsum Four O'clock is native to southeastern Nevada and southwestern Utah in the United States. In cooler regions, grow Gypsum Four O'clock as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Gypsum Four O'clock 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 Frasera genus — compare its care with other Frasera species on PlantoScan.
Frasera is part of the Gentianaceae plant family — browse all Gentianaceae genera and species.
Gypsum Four O'clock thrives in bright light and direct sun — see other bright-light plants.
More Frasera Species
Other Frasera species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Frasera gypsicola (Barneby) D.M.Post, family Gentianaceae (first published in Bot. Gaz. 120: 3 (1958)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Gypsum Four O'clock, 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 13a, 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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