The background is pretty cool looking!

Charcoal 1-2 parts,
orchid bark+mulch 2 parts
Orange bag of organic potting soil from home depot
Sphagnum moss 1 part
Peat moss 1 part
And coconut husk

Mix and match as needed. You are looking for loos soil that will drain good or it will turn into a bacteria laden bog.

Sorry I can't be more help. I know you have to get creative in Canada :/