Very healthy plants Pia. Please be sure to post photos of blooms of that last pot Pia. If the green leaved Calla is a variety of Z. aethiopica you might want to separate them. Z. aethiopica is typically an evergreen, wetlands plant although it can go dormant if it's too dry or cold. Tuberous Callas are typically dry season dormant but the tubers may rot if it's cool and wet.
Janet, I'm curious as to how the tuberous Arum/Calla Lilies are grown in the UK vs. Z. aethiopica varieties. Do you need to lift the tuberous Zantedeschia overwinter? Can Z. aethiopica varieties be left in ground?
