Has anyone tried growing a Bletilla in zone 5a or in a zone close to that? Zone 5a is -20 F to -15 F. I'm tempted to try growing Bletilla striata and plant it in a flower bed. I see there are some Bletilla sellers that advertise their plants are zone 5. Others say zone 6 or 7- might be natural variation of cold hardiness.
Has anyone watched this plant grow in alkaline soil? Did you see iron chlorosis? I have loam soil. I'm concerned I'll have to continuously put chelated sulfur on it to keep it well. Minerals in my water from the underground aquifer make the soil worse but I have a spot I can plant the Bletilla so it will be flood irrigated with ditch water. I've noticed some of my other plants are ok, or need minimal sulfur, if they're flood irrigated by water from the ditch.
Has anyone watched this plant grow in alkaline soil? Did you see iron chlorosis? I have loam soil. I'm concerned I'll have to continuously put chelated sulfur on it to keep it well. Minerals in my water from the underground aquifer make the soil worse but I have a spot I can plant the Bletilla so it will be flood irrigated with ditch water. I've noticed some of my other plants are ok, or need minimal sulfur, if they're flood irrigated by water from the ditch.