cactus succulent

Pencil Tree

The Story

Plant Bio

Euphorbia tirucalli, the pencil tree, is a spineless succulent shrub or small tree characterized by a heavy woody trunk and dense clusters of smooth, cylindrical, pencil-thin green branches. The true leaves are tiny, linear, and drop away quickly, leaving the fleshy stems to perform all photosynthesis.

The species displays solid green stems that form an intricate, architectural silhouette over time. The popular cultivar 'Firesticks' is distinguished by its more compact, upright-spreading habit and striking golden-yellow, coral-orange, and bright red stem tips during cooler weather or under intense sun.

Uses & Benefits:

Provides a striking, fine-textured architectural silhouette with its dense, pencil-thin branches.

Serves as an exceptionally drought-tolerant barrier plant or low-water container specimen.

Offers minimal ecological value to local fauna, as the toxic latex sap deters most herbivores and insects.

Essentials

At a Glance

Plant Type

Cactus Succulent

Height

354"

Width

118"

Light

Full Sun, Partial Sun

Zones

Water

Low

Humidity

Low to moderate

Lifespan

Perennial

Native To

Africa

Toxicity

High

Bloom period

Spring – Summer

In flower about 6 months of the year

Planting

How to Grow

Select a planting site with full sun and exceptionally well-draining, coarse sandy loam.
Dig a hole twice the width of the root ball but no deeper, ensuring the plant sits at its original nursery depth.
Water sparingly after planting, allowing the soil to dry out completely between waterings.
Withhold water entirely during the winter months to prevent cold-weather root rot.

Pro Tip

Prune with extreme caution using protective gloves and eyewear; the milky latex sap is held under pressure and will spray, causing severe skin blistering and temporary or permanent blindness upon eye contact.

Keep It Thriving

Care Guide

Do

Wear thick gloves and safety goggles whenever handling or pruning the plant.
Grow in a highly porous, mineral-rich potting mix if planting in containers.
Provide full sun to maintain dense growth and vibrant stem coloration.

Don't

Do not overwater or allow the roots to sit in stagnant, wet soil.
Do not prune heavily into old, leafless woody stems as they fail to resprout.
Do not handle the plant without protective gear due to the highly caustic sap.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Pest Check
Prune
Winter Prep

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Specimen PlantRock GardensCoastal GardensContainer PlantingXeriscaping

Companion Plants

Agave Aloe Crassula Kalanchoe

Multiply

Propagation Methods

Good to Know

Common Questions

Pencil Tree questions

What zones can Pencil Tree grow in?

Pencil Tree is hardy in USDA Zone 10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Pencil Tree deer resistant?

Yes — Pencil Tree is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Pencil Tree bloom?

Pencil Tree typically blooms in spring through summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Pencil Tree need full sun?

Pencil Tree does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Pencil Tree drought tolerant?

Yes — once established (usually after the first full season), Pencil Tree handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.