Pencil Cactus
Pencil cactus is a shrubby plant that is instantly recognizable through its long pencil-thin stems.
It is actually not a cactus, but a euphorbia. It has toxic milky sap and no spines.
However, like the average cactus, it is very heat and drought tolerant. Its bright green stems allow it to photosynthesize without relying on its leaves. The succulent stems store water to keep it from drying out during droughts.
Botanical name: Euphorbia tirucalli
Other names: Milk bush, pencil plant, pencil tree
Large pencil cactus hedge
TABLE OF CONTENTS
Pencil Cactus Appearance
Pencil cactus has a very distinct appearance. Thin stems branch off of each other, somewhat like cactus segments. The large, shrubby desert plant has irregular growth habit, but generally, the main stems grow up and outwards.
Bright green stems help it to photosynthesize while being drought tolerant. The stems may develop an orange or copper tone with lots of sunlight.
Mature pencil cacti become woody at the base. Very mature ones become tree-like with woody trunks.
Tiny 1 inch leaves and flowers appear, then fall off quickly. Tiny green fruits contain seeds and darken as they ripen.
*We carry a variety called “Sticks on fire,” which is much smaller and has multiple vibrant colors.
Pencil Cactus Landscaping Tips
Makes for a good protective hedge due to its size and toxicity.
Contains very toxic white sap. Handle with care, and use goggles and gloves. Do not put plants near foot traffic since the stems can break and expose sap. Keep from pets and children.
Handles heat and drought well in the desert. Pest resistant and low maintenance.
Keep in container to keep the size in check and for a tidier look. The interesting growth pattern of the plant adds artistic flair and texture.
Propagates very easily, and can be quickly shared in other parts of the yard and with other gardeners.
Pencil Cactus Origin
Pencil cactus is from various parts of Africa, Middle East, and South Asia, which enjoy warm weather.
Potted pencil cactus
Pencil Cactus Care
Soil: Loose, well-draining soil that is lightly fertile.
Temperature: Can withstand temperatures down to frost (=32 degrees Fahrenheit) for a short period of time.
Water: Occasional, deep watering. Allow the soil to completely dry out between waterings. Either use a moisture meter or stick your finger through the soil to gauge the moisture level. It’s better to err on the side of underwatering than overwatering.
Sun: Full sun to partial shade
Pencil Cactus Problems
Pests: Pencil cactus has minimal pests which include mealybugs.
To remove mealybugs, use insecticidal soap or apply rubbing alcohol directly to the area of infestation using a cotton swab. Whenever using any kind of pesticide, be aware that it can damage the plant if the temperatures are in the 80s or above.
Signs of overwatering: Drooping, squishy texture. Soil that never dries out.
Signs of too little water: Shriveling, drying skin
Signs of too much sun: Burning, fading color
Signs of too little sun: Etiolation
Pencil Cactus Propagation
Propagate pencil cactus via cuttings.
Use extreme caution when making cuttings since the toxic sap of the plant may spray. Wear goggles and gloves, and use a sharp blade.
Allow the cutting to callus, then plant in moist soil.
FAQ
How much does Pencil Cactus cost?
At our nursery, pencil cactus costs $25 for a 5-gallon container, $75 for a 15-gallon container, and $200 for a 24-inch box.
Prices are subject to change. Please contact us for the most up-to-date information on pricing. We may have larger sizes available. We provide installation services locally at a separate cost.
Does the pencil stick cactus have thorns?
No, the pencil stick cactus does not have thorns. It does have toxic, white sap, however.
How fast do pencil cacti grow?
Outdoors in the Palm Springs area, they typically grow about 1-2 feet a year.
Summary
| SIZE (H X W) | 30 feet x 10 feet |
|---|---|
| FLOWER COLOR | Yellow |
| FLOWER SEASON | Spring |
| EXPOSURE | Full Sun to Partial Shade |
| WATER | Low |
| GROWTH RATE | Moderate |
| HARDINESS | 32º F, USDA Zone 9 |
| PRUNING | None |