Is this pine bark mulch too big to use in blueberry potting mix?

I bought this Timberline pine bark mulch to use with peat moss, perlite, and maybe some miracle Gro potting mix to create a blueberry potting mix. This was the only pine bark mulch they had.

It looks pretty chunky though. Is it too big to use in a potting mix, and if so, what should I use instead if I can’t get finer pine bark mulch?

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looks good to me

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Why not just use it as actual mulch and not in the soil?

Buy some soil acidifier stuff to lower the Ph, and then use the pine bark as mulch

I read that it creates aeration in the potting mix. I bought soil acidifier as well as fertilizer for acid loving plants.

If I don’t use pine bark mulch in the mix, should it just be peat and perlite or should I substitute something else for the pine bark?

It looks ok to me as well for in ground plants.

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I have been using mini pine nugget (that’s not so mini) and it matches (in terms of chunkiness) what I have received as nice potted nursery plants. Last fall, I had a brain lapse and bought a lot of that timberline mulch instead of nugget and used it to up pot 5 blueberries amongst other things. Too early to tell how it does compared with the nugget but I expect to to break down whereas the nugget doesn’t, I think. I plant on switching them out to nugget in the fall.

So I shouldn’t use the Timberline mulch because it will break down? What should I use if I can’t get pine nuggets? I was thinking potting mix, peat moss, and perlite might do, but maybe the pine bark mulch/nuggets are necessary for aeration and drainage?

I don’t know. I’m new to this.