Kohleria blooms are not fully open
I have a few Kohlerias, I grow them first year from a rizomes. Two of them have buds, but it seems they just don't want to grow and become flowers. One kohleria Marquise des Sade is in bloom, but the flower is not fully open for three days...is it normal? May be they just taking their time? The conditions are proper as it is suggested by growers.
Here is a link that might be useful: