Ferocactus hamatacanthus is the most cold resistant of the Ferocacti, being hardy to below 0°F (-18°C). Ferocactus hamatacanthus has large tubercles and large yellow flowers. Ferocactus hamatacanthus generally remains a single barrel, but sometimes can form a large clump of stems. You are selecting the cactus size pictured.
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Typical flower just opening.
