Echinocactus ingens. (Biznaga Gigante). Synonyms: Echinocactus platyacanthus, Echinocactus visnaga, Echinocactus helophorus, Echinocactus karwinskii. (USDA 9b-11) Hardy to 25° F. Full sun. Regular summer water, dry winter. Yellow flowers. Solitary up to 7' tall, 3' wide. Origin: Central Mexico. |
