Pencil Cactus
Euphorbia tirucalli
Also known as: Firestick, Milk Bush
A complete guide to growing and propagating Pencil Cactus: its care needs, how to take cuttings and root them, how long propagation takes, and how to fix the most common problems.
Pencil Cactus care at a glance
Track your pencil cactus cuttings & propagation in SnipLog
Log when you took each cutting, set rooting reminders, and watch your propagation timeline â free on iPhone.
How to propagate Pencil Cactus
Stem cuttings
- Wearing gloves and eye protection, cut a pencil-thick stem (the latex is caustic).
- Dip the cut end in water to stop the sap flow, then let it callus for a week.
- Insert the callused end into dry, gritty mix.
- Keep warm and barely moist in bright light until it roots.
Common Pencil Cactus problems & fixes
Shriveled, wrinkled leaves
Underwatering â give a thorough soak and let it drain fully, then wait until the soil is bone dry.
Mushy, translucent leaves or stems
Overwatering and rot. Cut back watering, repot into a gritty fast-draining mix, and remove any rotted roots.
Stretched, pale growth
Too little light (etiolation). Move to bright, direct light; behead and re-root the stretched top to reset a compact shape.
Track your pencil cactus cuttings & propagation in SnipLog
Log when you took each cutting, set rooting reminders, and watch your propagation timeline â free on iPhone.
Toxicity notes are a general guide based on ASPCA-style classifications â if a pet ingests any houseplant, contact your vet. Care needs vary with your home's conditions.