Sand Flax Plant Care
Linum arenicola (Small) H.J.P.Winkl.
Updated · Sources · How we source care data
Linum arenicola, known as sand flax, is a flowering plant in the flax family, Linaceae. It is endemic to Florida in the United States, where it is considered an endangered species.
Every 7–10 days
Full sun to partial shade
60–80°F
40–60%
At a glance
How do you care for Sand Flax?
Water Sand Flax 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 40–60% humidity. Fertilize it every 6 months during the growing season.
Where Is the Sand Flax Native To?
What Is the Sand Flax?
Sand Flax (Linum arenicola) belongs to the Linaceae family within the Linum genus. Sand Flax is native to Florida in the United States.
Sand Flax displays an upright, branching herb growth habit, reaching up to 2 ft tall with a spread of approximately 1.5 ft. Sand Flax produces delicate five-petaled flowers in shades of blue, pink, or white.
Leaf size: approximately 2 inches.
How Often Should You Water a Sand Flax?
Linum arenicola 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 Sand Flax Need?
Sand Flax thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Sand Flax Prefer?
Linum arenicola grows best at temperatures of 60–80°F. Sand Flax prefers humidity levels of 40–60%.
Temperature
60–80°F
Humidity
40–60%
What Soil Mix Works Best for a Sand Flax?
Well-draining sandy loam with added organic matter. Good drainage is essential for Sand Flax to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Sand Flax?
Feed Sand Flax 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 Sand Flax?
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 Sand Flax?
Sand Flax can be propagated through seeds, division of clumps. Similar propagation techniques also apply to pale flax plant care, which shares the same genus.
Is the Sand Flax Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Sand Flax, 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 Sand Flax?
Sand Flax 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 Sand Flax Need?
Sand Flax grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Sand Flax is native to Florida in the United States. In cooler regions, grow Sand Flax as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Sand Flax 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 Linum genus — compare its care with other Linum species on PlantoScan.
Linum is part of the Linaceae plant family — browse all Linaceae genera and species.
Sand Flax thrives in bright light and direct sun — see other bright-light plants.
More Linum Species
Other Linum species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Linum arenicola (Small) H.J.P.Winkl., family Linaceae (first published in Nat. Pflanzenfam. ed. 2 , 19a: 116 (1931)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Sand Flax, 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.
Identify Plants Like the
Sand Flax 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