FREE: Barrel Cactus Hedgehog Live Plant w/Roots Winter Hardy from SE Colorado

Do you know what zones they are happy in?

I don't know the zones but from researching them, they grow in a lot of places! Here are some things I found "Echinocereus viridiflorus has several differences from most other hedgehog species; it is very frost tolerant, grows much further north. Central USA, from southeast Wyoming and southwest North Dakota, south to Texas (west and north) and New Mexico. Chihuahuan Desert plains, woodland, grassland, prairie."
Recommended Temperature Zone:
sunset: 9b-11
USDA: 4-10
Frost Tolerance: Very cold resistant, hardy to -20° F (-28°C) or less, it looks shriveled and dehydrated in winter

Minimum Avg. Temperature: 50°F (10°C)

Sun Exposure: Full sun to light shade

Origin: Northern Mexico, USA (Colorado, New Mexico, Wyoming, South Dakota, Oklahoma)
Growth Habits: Cylidrical dark green stems, solitary or clustering, up to 8 inches tall (20 cm), up to 3 inches wide (7 cm); 13 obtuse ribs; 0 to 3 centrals, up to 0.8 inch long (2 cm); 15 stiff radials, up to 0.4 inch long (1 cm).
Watering Needs: Little water