Installing decking with grain curving up?

by Leo

I'm in the process of building a western red cedar deck. I've been installing the decking boards such that the end grain forms a dome (bark-side up).

But some boards have defects or loose knots on that side of the board, while the other side looks much better.

Would it be foolish to install these boards with the bark-side down? I don't want to end up with cupping. How likely is it that I will end up with cupping if I install the boards this way? I am using 2x6 decking on 24-inch joist spacing and hidden (Camo) fasteners.

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