Pencil Cactus Plant Care
Euphorbia tirucalli L.
Euphorbia tirucalli is a tree native to Africa that grows in semi-arid tropical climates. A hydrocarbon plant, it produces a poisonous latex that can cause temporary blindness.
Every 14â21 days
Full sun to partial shade
60â85°F
40â60%
What Is the Pencil Cactus?
Pencil Cactus (Euphorbia tirucalli) belongs to the Euphorbiaceae family within the Euphorbia genus. Pencil Cactus is native to Africa that grows in semi-arid tropical climates. Pencil Cactus is also known as Fire Sticks, Milk Bush, Sticks of Fire.
Pencil Cactus displays a varies by species, can be upright, sprawling, or clumping growth habit, reaching up to 3 inches tall with a spread of approximately 2 inches. Pencil Cactus produces small, often inconspicuous flowers surrounded by colorful bracts.
Leaf size: approximately 4 inches.
How Often Should You Water a Pencil Cactus?
Euphorbia tirucalli requires watering every 14â21 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 14â21 days
Let soil partially dry between waterings
What Light Does the Pencil Cactus Need?
Pencil Cactus thrives in full sun to partial shade light conditions. The optimal light range is 200â400 lux. Avoid placing Pencil Cactus in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Full sun to partial shade
200â400 lux
What Temperature and Humidity Does the Pencil Cactus Prefer?
Euphorbia tirucalli grows best at temperatures between 60°F and 85°F. Pencil Cactus prefers humidity levels of 40â60%.
Temperature
60â85°F
Humidity
40â60%
What Soil Mix Works Best for a Pencil Cactus?
Well-draining sandy soil mix with perlite and gravel. Good drainage is essential for Pencil Cactus to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Pencil Cactus?
Repot every 2-3 years 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 Pencil Cactus?
Pencil Cactus can be propagated through stem cuttings, offsets, seeds. Similar propagation techniques also apply to poinsettia plant care, which shares the same genus.
Fertilizing
Every 6 months
During the growing season
Is the Pencil Cactus Toxic to Pets and Children?
Toxic to Pets & Children
Mildly toxic if ingested, can cause skin irritation
What Pests and Diseases Affect the Pencil Cactus?
Pencil Cactus is susceptible to mealybugs, spider mites, aphids. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
What USDA Hardiness Zone Does the Pencil Cactus Need?
Pencil Cactus grows outdoors in USDA Zone 9b â 11b. Native to Africa that grows in semi-arid tropical climates, Pencil Cactus is adapted to warm climates. In cooler regions, grow Pencil Cactus as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 9b â 11b
Keep exploring plants
Pencil Cactus 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 Euphorbia genus â compare its care with other Euphorbia species on PlantoScan.
Pencil Cactus tolerates low-light rooms and shaded spots â browse the full list of low-light plants.
More Euphorbia Species
Other Euphorbia species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
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