Euphorbia knuthii is a small succulent shrub with an unusual gnarled caudex topped with spiny cascading branches. The caudex grows up to 5 inches (12.5 cm) in diameter. Branches have an attractive patterning that turns reddish in good light. They can get up to 3.3 feet (1 m) long in cultivation.
Euphorbia Knuthii can be quite beautiful when it is well-taken care of. This succulent type needs typical watering as the other succulents. The watering method is very important to keep your plants healthy. It should not sit on the water, and an excess amount of water should be avoided. The best way of watering is soak and dry method this succulent. Yet, the succulent should be controlled to avoid overwatering.
When propagating Euphorbia Knuthii from cuttings, cut a leaf from the mother plant carefully with a clean knife or scissors.
Full to partial sun is the best for its growth. It is better to grow outdoor rather than indoor. This type of succulent prefers a warm climate. It can survive at zone 10a which is around -1.1 °C (20 °F).
As with all of the Euphorbias, E. knuthii also produces a irritating sap which may cause skin rashes or even blistering where it comes into contact with he skin, so try to avoid all contact with the sap, and wash you hands thoroughly after pruning the plant. Description: Euphorbia knuthii is a dwarf spiny succulent shrublet with a tuberous main root, which continues into a serpentine caudex, freely branched from the top.