Cat Tails Euphorbia (Euphorbia alluaudii)

Plant Snapshot

Common Name: Cat Tails Euphorbia
Latin Name: Euphorbia alluaudii
Hardiness Zones: USDA 9–11 (tender succulent that is damaged by frost; colder zones will cause dieback or death, warmer areas support year round growth)
Typical Height: 1–6 ft (30–180 cm) shrub or subshrub
Typical Spread: 1–4 ft (30–120 cm) depending on branching and pruning
Bloom Period: Unknown by region; species produces small Euphorbia cyathia when it blooms
Soil Preferences: Very well drained sandy or rocky soil. Low organic content is ideal. Poor drainage leads to root rot and collapse
Light Preferences: Full sun to bright light. Tolerates part shade but will be more compact and may flower less in low light
Toxicity: Milky latex is a skin and eye irritant and can be toxic if ingested. Keep away from pets and children and wear gloves and eye protection when cutting
Propagation: Stem cuttings allowed to callus then rooted in very well drained mix. Seed propagation possible under warm conditions. Avoid sap contact when cutting

Key Facts

A succulent spurge native to Madagascar
Forms a branched shrub or subshrub with succulent stems
Has a milky latex that can irritate skin and eyes
Used in containers and xeric or rock gardens
Prefers very well drained soil and infrequent watering
Tolerates bright sun and hot dry conditions
Propagated from stem cuttings and from seed

Cat Tails Euphorbia is a succulent spurge from Madagascar valued for sculptural branching stems and strong drought tolerance. It performs well in pots and xeric or rock gardens but has a caustic milky sap that will irritate skin and eyes.

Identification

Branched shrub or subshrub with succulent stems and a milky latex typical of Euphorbia species. Mature plants are commonly reported between 1 and 6 feet tall with a spread of about 1 to 4 feet depending on age and pruning.

Best uses and where to grow

Use as a container specimen or in a dry rock or xeric garden where drainage is sharp and sun is abundant. It tolerates bright sun and hot dry conditions and is generally treated as a tender succulent suited to warm climates roughly USDA 9 to 11.

Soil and watering

Plant in very well drained sandy or gritty soil with low organic content. Water infrequently and allow the mix to dry between deep waterings. Poor drainage and persistent moisture lead to root rot and collapse.

Planting and spacing

Place plants where they receive full sun to very bright light. Space plants according to their mature spread so they have room to branch and show their sculptural stems. In cooler areas grow in containers so plants can be moved when temperatures drop below frost.

Pruning, propagation and after flowering care

Prune to shape or remove damaged stems while wearing gloves and eye protection because of the latex. Propagate from stem cuttings after the cut surface has callused and from seed under warm conditions. Remove spent flowering stems and dispose of clippings safely to avoid sap contact.

Pests, problems and safety

Main problems are overwatering and poor drainage. The milky sap can cause skin and eye irritation and can be harmful if swallowed. Keep plants away from children and pets and wear protective gear when cutting or handling.

Frequently asked questions

How fast does Cat Tails Euphorbia grow?: Growth rate varies with light, temperature and water. Under strong light and warm dry conditions plants often grow at a slow to moderate pace and over time reach the typical height range shown above.
Is Cat Tails Euphorbia frost hardy?: It is generally treated as a tender succulent for USDA zones about 9 to 11 and will be damaged by frost in cooler areas.
Can I grow Cat Tails Euphorbia in a container?: Yes. Use a cactus or gritty mix for sharp drainage and give bright light. Containers let you move plants indoors when temperatures fall.
Is Cat Tails Euphorbia poisonous to pets?: The plant contains irritant latex common to Euphorbia species and can cause harm if ingested or if sap contacts skin or eyes. Keep it out of reach and contact poison control for exposures.
How do I propagate Cat Tails Euphorbia?: Take stem cuttings, allow the cut to callus and then root in a very well drained mix. Seed propagation is also possible in warm conditions. Avoid sap contact when taking cuttings.