Thanks all for the responses.
The Potting Mix in the SWC EarthTainers is quite loose, and if I use 100% Potting Mix (without Microbark nor Perlite) I think I can replicate a "bog-like" moisture environment.
I've just ordered a pack of Tango hybrid seeds with an 85 DTM. As we have a mild Winter here (first hard freeze in mid January) I will start the seeds in July with plant out in September for a Fall / early Winter harvest.
Raybo