That bark looks very good for use in a container mix.
It has the fibrous look of Fir bark, but I could be wrong. Either way, good stuff.

When you say compost, I assume you mean it in the European sense of 'potting mix.'
It is common for potting mixes to have nutrients/fertilizer added.

Even with the added nutrients, the compost won't be a major fraction of the mix,
so be sure to add 1 Tablespoon Dolomitic Garden Lime per gallon of overall mix you make.
Many of us like to incorporate a slow-release fertilizer like Osmocote, as well.

Josh

Hi Josh, thank you for the reply.

You are right the potting soil available here have nutrients but I never have seen any label on the bags. The one I bought yesterday has labeled compost and its nutrients values very clearly; this is my first time I have seen. It is also very different from the one I used before. It has a lot of organic substances too and I feel less peat moss.

I am sorry to say this; it'll be a bit difficult to find Dlomitic Garden Lime here but I found something like lime (white creamy) in this compost too, may be they have already added.

Thanks,
Caelian