The difference in structure, water retention and longer term pH control of European Peat mixes (including CANNA Terra Professional Plus), as compared to Canadian peat mixes , makes it different to correctly water and fertilize the plants.
CANNA TERRA nutrients are not suitable for growing on Canadian Peat Mixes because they are designed for higher quality, better pH control and pre-fertilized potting soils.
The CANNA SUBSTRA line works well with the Canadian Peat Mixes, but is originally designed to be used on completely inert substrates. Substra is also designed to meet specific water quality (hard or soft water) as plants react stronger to the differences in inert systems.
CANNA Peat Mix A&B is specifically designed to meet the character of Canadian Peat mixes. Like the mixes itself, it is easy to use.