LIGHT

• Most succulent Euphorbias require bright, direct light to maintain their structural integrity and vibrant colors.
• Indoors, a South or West-facing window is ideal; insufficient light will cause "etiolation," where the stems become weak, pale, and stretched.
• Species with colorful foliage, like the African Milk Tree, need high light levels to prevent the leaves from reverting to a solid, dull green.

WATER

• Practice strict water discipline; allow the potting medium to dry out completely from top to bottom before watering.
• When watering, drench the soil until water runs out of the drainage holes, then empty the saucer immediately.
• During the winter dormancy period, reduce watering to once every 4–6 weeks; the combination of cold and wet soil is the most common cause of "mushy" stem rot.

SOIL

• Requires an extremely fast-draining, gritty substrate.
• Use a high-quality cactus and succulent mix, heavily amended with 50-70% inorganic material such as pumice, perlite, or decomposed granite.
• Avoid mixes with high peat content, as they can become hydrophobic when dry or hold too much moisture when wet.

GROWTH HABIT

• Ideal conditions: High light intensity, low humidity, and temperatures between 60–85°F.
• Growth rate & size: Varies by species; columnar types can grow several inches per year, eventually reaching ceiling height, while globose types grow very slowly.

PROPAGATING

• Primarily propagated via stem cuttings.
• Safety Protocol: Wear gloves to protect against the toxic sap. Allow the cut end to callus in a dry, shaded spot for at least a week before placing it in dry, gritty soil.
• Do not water the cutting until you see signs of new growth, indicating that roots have formed.

PRUNING

• Pruning is generally done to manage size or to remove damaged sections.
• Use sharp, sterile shears to prevent the spread of pathogens.
• To stop the "bleeding" of the milky sap after a cut, you can spray the wound with cool water or dab it with a paper towel.

REPOTTING

• Repot every 3–5 years or when the plant becomes top-heavy.
• Because many Euphorbias are heavy and spiny, use a heavy ceramic or clay pot for stability and wrap the plant in carpet scraps or thick cardboard for safe handling.

FERTILIZING

• Feed sparingly. Apply a balanced liquid fertilizer diluted to one-quarter strength only once or twice during the peak summer growing season.
• Excessive fertilizer can cause weak, bloated growth that is more susceptible to pests.

FLOWERING

• Euphorbia "flowers" are actually cyathia—tiny floral structures often surrounded by colorful, leaf-like bracts.
• Flowering usually occurs in late spring or summer but is highly dependent on the plant receiving a "rest period" with cooler temperatures in the winter.

TOXICITY

• Highly Toxic. The milky sap (latex) is a severe irritant to the skin and eyes and is poisonous if ingested. Keep well away from pets and children.

PRO TIPS

• The "Sap" Test: If you are unsure if a plant is a cactus or a Euphorbia, a tiny prick to the skin will reveal the white milk of a Euphorbia.
• Mealybug Management: These pests love to hide in the crevices of Euphorbia ribs. Use a cotton swab dipped in isopropyl alcohol to spot-treat infestations immediately before they spread.