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Euphorbia grandicornis — also called cow’s horn, is a striking cactus—shrub prized for bold, architectural forms and dramatic zigzag stems. It’s a standout for collectors, xeriscapes, and dry-climate gardens, but it demands respect: like other euphorbias it exudes a toxic, irritating milky sap.
Prefers bright light to full sun. In hot, arid climates it tolerates direct sun and develops best color and form with strong light. In hot, humid or very hot sun, provide some dappled afternoon shade to avoid sunscald. Needs fast-draining, gritty cactus/succulent mix. Avoid heavy, water-retentive soils that cause root rot. Drought-tolerant once established. Water sparingly — allow the soil to dry between thorough waterings. Reduce watering in winter when growth slows.
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Euphorbia grandicornis — also called cow’s horn, is a striking cactus—shrub prized for bold, architectural forms and dramatic zigzag stems. It’s a standout for collectors, xeriscapes, and dry-climate gardens, but it demands respect: like other euphorbias it exudes a toxic, irritating milky sap.
Prefers bright light to full sun. In hot, arid climates it tolerates direct sun and develops best color and form with strong light. In hot, humid or very hot sun, provide some dappled afternoon shade to avoid sunscald. Needs fast-draining, gritty cactus/succulent mix. Avoid heavy, water-retentive soils that cause root rot. Drought-tolerant once established. Water sparingly — allow the soil to dry between thorough waterings. Reduce watering in winter when growth slows.
Call for availability