Echinocereus triglochidiatus 'White Sands' x E. coccineus

Echinocereus triglochidiatus 'White Sands' x E. coccineus is a mistake in the greenhouse. But these hybrids are definately large like their cousins and may have more potential to be larger and more cold hardy than either parent. These should take a dry -15F with no trouble but not sure as we have never tested in the garden. Most plants have large black spines and im sure the flowers will be red.