Euphorbia mammillaris corn cob

Morphological Characteristics

Euphorbia mammillaris, commonly known as Corn Cob Euphorbia, is a member of the Euphorbiaceae family, recognized for its distinctive, cactus-like appearance. This succulent features cylindrical stems that are covered with rows of conical tubercles, giving it a cob-like appearance. The stems are typically green but can have a slight reddish or purplish tinge, especially when exposed to full sun. The plant often produces small, inconspicuous yellow or greenish-yellow flowers at the tips of the stems during the growing season.

Growth Habits

Euphorbia mammillaris is a slow-growing succulent that prefers a stable, warm environment. It thrives in mild climates and can tolerate some drought conditions. In its natural habitat, it often grows in rocky or sandy soils, which provide excellent drainage.

Maintenance Points

• Lighting: This plant prefers bright, indirect sunlight but can also tolerate full sun. Adequate light helps maintain the plant’s compact shape and vibrant color. Too little light may result in elongated, weak growth.

• Watering: As a succulent, Euphorbia mammillaris requires minimal watering. The soil should be allowed to dry out completely between waterings. Over-watering or poor drainage can lead to root rot. Water sparingly during the winter months when the plant is dormant.

• Soil: A well-draining succulent or cactus mix is ideal, potentially enhanced with additional perlite or sand to improve drainage.

• Temperature: It does best in temperatures between 20-30°C (68-86°F). Avoid exposure to temperatures below 10°C (50°F) to prevent cold damage.

• Fertilization: Feed lightly with a balanced, water-soluble fertilizer during the growing season. Over-fertilization can harm the plant, so it should be done sparingly.

Reproduction Method

Euphorbia mammillaris can be propagated primarily through stem cuttings.

1. Stem Cuttings: Cut a healthy stem section from the parent plant using a clean, sharp knife. Let the cutting dry for a few days until the cut end forms a callus to prevent rot. Plant the callused end in well-draining soil and water sparingly until roots develop.

2. Seed Propagation: Although less common, Euphorbia mammillaris can also be grown from seeds. Sow seeds in a well-draining soil mix and keep the soil slightly moist until germination.

Safety Note

Euphorbia mammillaris contains a milky sap that can be irritating to the skin and eyes. When handling the plant, especially when making cuttings, it is advisable to wear gloves and wash your hands thoroughly afterwards to avoid irritation.