Hi Karen,
Rodynda is the only one of those varieties I have grown. It does not mature until late autumn/early winter.
It produces very large round heads and it tastes fantastic.
Your spacing for this cabbage is too close. Definitely go for 45×45 with these.
I believe Tinty is a winter/spring cabbage, i.e., harvested Jan-March. Its too soon for either of these varieties to be forming heads.
As for the Calabrese I hate the taste of the stuff!!
Don.