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Pencil Euphorbia

Euphorbia tirucalli

Pencil Cactus
Cactus & Succulents

A leafless succulent shrub from Africa made of countless pencil-thin green stems. The ‘Fire Sticks’ form turns coral and red-orange in cool weather. It thrives on very little water and adds bold, fine-textured form to modern desert gardens and large pots.

Large
Full sunpreferred
Ask a designer about it
Mature size4–10′ tall, slightly narrower than tall
Growth rateSlow to moderate; ‘Fire Sticks’ grows slower than the green form
Water useVery low
SunFull sun; best stem color in full sun
BloomTiny yellow flowers at stem tips in spring; not showy
Cold hardinessFrost tender; damaged below about 28°F
FoliagePencil-thin green stems; ‘Fire Sticks’ blushes red-orange in winter
SapMilky latex irritates skin and can seriously injure eyes

Living with it in the Phoenix Valley

Watering

Follow the shrub, groundcover and succulent schedule in our Landscape Care guide. Water sparingly and only as needed. Extra water pushes soft, floppy growth, and soggy soil causes root rot, which is its main problem.

Pruning

It rarely needs it. If a stem must come out, do it in late spring, and wear gloves and eye protection. Rinse tools afterward, since the sap is sticky and caustic.

Cold

Cover it on freezing nights. Plants in pots can be moved under a patio cover.

How our designers use it

Container specimen

It makes a striking pot plant on a patio or courtyard, where it can be moved for frost and kept to a set size.

Modern texture

The dense, upright stems give fine texture next to bold agaves and smooth stucco walls.

Winter color

‘Fire Sticks’ brings warm coral and orange tones in the months when most of the garden is green.

Good to know

Sap

The milky sap can blister skin and cause severe eye injury. Wear gloves and eye protection when handling it, and keep it out of reach of children.

Pets

The ASPCA lists pencil cactus as toxic to dogs, cats and horses. The sap irritates the mouth and stomach.

Around the pool

Stems that snap off leak sap, so we place it away from pool decks, seating and paths where people brush past.

Pairs well with

Similar plants

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Picturing one in your yard?

Our designers can show you where it will thrive, what to plant beneath it and how it fits the rest of your landscape.

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