Rubra African Milk Tree | Red Purple Succulent Cactus

Rubra African Milk Tree

5 Gallon

$99.00

1/2

Rubra African Milk Tree

Euphorbia trigona ‘Rubra'

A fast-growing, architectural succulent with dramatic red-purple stems and bold, sculptural form.

$99.00

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Bay Area–Based Nursery

We specialize in plants grown and delivered in their original pots and soil.
Because of their size and weight, our plants are not suitable for long-distance shipping and are delivered locally to ensure health and quality.

While delivery is limited to our local service area, we’re happy to support garden design and plant selection remotely.

For local plant professionals, we’re always glad to connect and explore ways to support your customers.

The Red African Milk Tree is a striking, sculptural succulent that commands attention with its architectural form and dramatic, reddish-purple coloration. A selected cultivar of the classic Euphorbia trigona, 'Rubra' features thick, upright, three-angled stems that are beautifully flushed with burgundy, crimson, and deep purple, especially when grown in bright light . The stems are lined with small, oval leaves and a row of sharp, yet manageable, spines. Over time, this vigorous grower develops multiple branches, forming a dense, shrub-like, columnar specimen that adds bold, exotic structure to sunny interiors and drought-tolerant landscapes. Like all euphorbias, it exudes a milky sap that is a skin and eye irritant and toxic if ingested .

Knowing how we measure the size?

When browsing our plants, you may notice size terms such as Gallon, Multi, or Stand. These describe how a plant is grown, containerized, or structured at the time of sale — not just its height. Understanding these terms will help you choose the right plant for your space and expectations.

🌱 Gallon Size (Container Size)

Gallon refers to the size of the nursery container the plant is currently growing in (e.g. 1 Gallon, 5 Gallon, 15 Gallon).

A larger gallon size generally means:
- A more established root system
- A sturdier plant
- Faster visual impact after planting
Example:
- 5 Gallon: Ideal for residential gardens, easy to handle, good balance of value and maturity
- 15 Gallon: More mature, provides quicker results in the landscape

Note: Gallon size does not guarantee a specific height, as growth varies by species.

🌳 Multi (Multi-Trunk / Multi-Branch Form)

Multi indicates the plant has multiple trunks or main stems growing from the base.

Commonly used for:
- Ornamental trees
- Feature plants
- Japanese maples, olives, crepe myrtles, etc.
Why choose Multi:
- Fuller, more sculptural appearance
- Strong visual presence even at younger ages
- Popular for design-focused landscapes

🌲 Stand (Single-Trunk / Standard Form)

Stand (short for Standard) refers to a single, dominant trunk with a raised or naturally formed canopy.

Commonly used for:
- Shade trees
- Street trees
- Orchard and structural plantings
Why choose Stand:
- Clean, classic tree form
- Easier clearance for walkways and lawns
- Preferred for long-term structure and uniformity

🌿 Choosing the Right Size

If you want instant impact → larger Gallon, Multi form
If you want long-term structure → Stand form
If you want flexibility and value → mid-size Gallon containers

If you’re unsure which size or form fits your project, our team is happy to help you select the best option based on your space, timeline, and design goals.

Foliage & Flowers: Thick, upright, three-angled stems with distinctive vertical ribs; stems are flushed with red, burgundy, and purple, especially in bright light; small, oval, deciduous leaves appear along the ribs, often tinged red; inconspicuous, tiny flowers are rarely produced in cultivation .
Mature Height: 4-6 ft indoors; can reach 6-8 ft or more in ideal outdoor conditions .
Mature Spread: 2-3 ft (can be pruned to maintain compact form)
Growth Rate: Fast
Hardiness Zones: USDA 10-11 ; frost-tender
Light Requirement: Full sun to bright indirect light (best color in full sun)
Core Benefits: Striking red-purple coloration, bold architectural form, fast-growing, drought tolerant, easy to propagate, dramatic statement plant
Best Uses: Indoor specimen, sunny windowsill, patio container, xeriscape gardens (frost-free zones), modern and minimalist designs

Q: Why is my 'Rubra' turning green?
A: The intense red coloration is directly related to light exposure. If the plant does not receive enough bright, direct sunlight, the stems will revert to a more greenish color. To maintain its vibrant red-purple hue, place it in the sunniest location available—a south- or west-facing window indoors, or full sun outdoors .

Q: Is the milky sap dangerous?
A: Yes, the milky white latex sap is toxic and a severe skin and eye irritant . Always wear gloves when handling, pruning, or propagating this plant. Avoid contact with skin and especially eyes. Keep the plant out of reach of children and pets. If contact occurs, wash immediately with soap and water .

Q: How often should I water it?
A: Water deeply but infrequently, allowing the soil to dry out completely between waterings . During the active growing season (spring and summer), this may mean watering every 1-2 weeks. In winter, reduce watering to once a month or less. Overwatering is the most common cause of failure, leading to root rot .

Q: How do I prune or shape it?
A: Prune in spring or early summer using clean, sharp pruning shears. Wear gloves to protect against the sap. Cut stems at a joint or node to encourage branching. The plant will respond by producing new stems from below the cut. Allow cut ends to callous over for a few days before handling.