Silver Leucas Plant Care
Leucas argentea var. neumannii (Gürke) Sebald
Updated · Sources · How we source care data
Leucas argentea var. neumannii is known for its striking silver-gray foliage and compact growth habit, making it a standout in any garden or landscape. Its aromatic leaves add to its appeal, attracting both humans and pollinators alike.
Every 7–14 days
Full sun to partial shade
60–80°F
50–70%
At a glance
How do you care for Silver Leucas?
Water Silver Leucas 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 60–80°F (16–27°C) and 50–70% humidity. Fertilize it every 2 months during the growing season.
What Is the Silver Leucas?
Silver Leucas (Leucas argentea var. neumannii) belongs to the Lamiaceae family within the Leucas genus. Silver Leucas is native to India, Sri Lankaheight: 1.5width: 1fertilizer: 2wateringMin: 7wateringMax: 14humidityMin: 50humidityMax: 70temperatureMin: 60temperatureMax: 80leafSize: 2.
Silver Leucas displays a low spreading herb growth habit, reaching up to 1 ft tall with a spread of approximately 1 ft. Silver Leucas produces small tubular white flowers in dense spikes.
Leaf size: approximately 2 inches.
How Often Should You Water a Silver Leucas?
Leucas argentea var. neumannii 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 Silver Leucas Need?
Silver Leucas thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Silver Leucas Prefer?
Leucas argentea var. neumannii grows best at temperatures of 60–80°F. Silver Leucas prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
60–80°F
Humidity
50–70%
What Soil Mix Works Best for a Silver Leucas?
Well-draining sandy loam with added compost for nutrients. Good drainage is essential for Silver Leucas to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Silver Leucas?
Feed Silver Leucas every 2 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 2 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 Silver Leucas?
Repot annually in 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 Silver Leucas?
Silver Leucas can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to leucas flagellifera plant care, which shares the same genus.
Is the Silver Leucas Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Silver Leucas, 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 Silver Leucas?
Silver Leucas 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.
Keep exploring plants
Silver Leucas 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 Leucas genus — compare its care with other Leucas species on PlantoScan.
Leucas is part of the Lamiaceae plant family — browse all Lamiaceae genera and species.
Silver Leucas thrives in bright light and direct sun — see other bright-light plants.
More Leucas Species
Other Leucas species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Leucas argentea var. neumannii (Gürke) Sebald, family Lamiaceae (first published in Stuttgarter Beitr. Naturk., A 341: 113 (1980)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Silver Leucas, 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.
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