Obregonia denegrii at the Huntington Gardens in early July
USDA: 9-11
Frost Tolerance: 20°F (-7°C) for short periods
Sun Exposure: Light shade
Origin: Mexico (Tamaulipas: Ciudad Victoria)
Growth Habits: Solitary, globose stem, 3.2 to 5 inches in diameter (12 cm), greyish green to dark green, triangular tubercles, 0.8 to 1 inch wide at the base, 0.4 to 0.6 inch long, areoles at the tips of the tubercles with 2 to 4 soft spines, 0.4 to 0.6 inch long; thick root
Propagation: Seeds, sometimes grafted to speed up growth.
Blooming Habits:
The Obregonia denegrii has white diurnal flowers, 1 inch in diameter (2.5 cm), 1 to 1.2 inches long (2.5-3 cm) in summer. The seeds are large and black.
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