Euphorbia Knuthii - Caudex

Euphorbia Knuthii

You will receive the exact specimen shown here.
Longest arm measures approximately 9" long.
Showcased here in handmade one-of-a-kind handmade pottery (sold separately).
Will be shipped bare root.

Euphorbia knuthii, also known as Striped Green Spurge or Knuth's Medusa Head, is a striking, caudex-forming succulent native to Southern Africa. It's a popular choice for succulent enthusiasts due to its unique appearance and relatively easy care.

Characteristics:

• Caudex: A prominent feature is its thickened, woody base or caudex, which stores water and adds a sculptural element making it popular for bonsai enthusiasts.  The caudex can grow up to 5 inches in diameter.
• Stems: Slender, segmented stems emerge from the caudex, creating a cascading or sprawling appearance, similar to a Medusa's head. These branches are typically striped green and can turn reddish in good light conditions. They can grow up to 3.3 feet long in cultivation.
• Flowers: Small, pale green flowers, known as cyathes, appear in late summer to early fall. These are followed by seed capsules that ripen about a month later.
• Toxicity: Like many Euphorbia species, Euphorbia knuthii produces a white, milky sap (latex) that can cause skin irritation, allergic reactions, and is toxic if ingested. Handle with care, wear gloves and eye protection when pruning or handling the plant. 

Care and Cultivation:

• Light: Prefers bright, indirect light to full sun, but can tolerate some shade. However, shade-grown plants may exhibit weaker, more etiolated growth.
• Watering: As a succulent, Euphorbia knuthii is drought-tolerant and requires infrequent watering. Water deeply during the growing season (spring and summer) and allow the soil to dry out completely between waterings. Reduce watering significantly during the dormant winter months. Overwatering is a common issue and can lead to root rot.
• Soil: Requires well-draining soil, such as a cactus or succulent mix. A gritty, inorganic medium like coarse sand, pumice, or perlite is recommended.
• Temperature: Prefers warm temperatures, ideally between 20°C and 30°C (68°F to 86°F). It is not frost-hardy and needs protection from temperatures below 40°F (4°C). It can tolerate temperatures down to -6ºC, but it is best suited for USDA Zones 9-11.
• Pruning: Pruning in early spring every year or two can help encourage bushier growth and maintain a more compact shape. Trim stems back to the soil line or roots and allow the cut ends to heal before watering.
• Fertilization: Light fertilization during the growing season (spring and summer) with a diluted, balanced fertilizer can be beneficial, but is not strictly necessary.
• Propagation: Can be propagated from seeds or stem cuttings. Allow cuttings to callus over for a few days before planting to prevent rot. 

Special Considerations:

• Dormancy: Euphorbia knuthii typically goes dormant in the winter, with growth slowing down.
• Pests and Diseases: Generally pest and disease resistant, but can be susceptible to scale insects, mealybugs, spider mites, thrips, and root rot if overwatered. 

Overall, Euphorbia knuthii is a rewarding plant to grow, offering a unique appearance with its caudex and cascading stems, while being relatively low-maintenance once established.