British Columbia: Camellia blooms have brown edges

Every year my camellia flowers have brown edges, some years worse than others. It is a young plant growing in mostly shade in zone 8. Adding a picture. Can someone please help me identify the problem? If it is some sort of blight, does it have to be treated, or is it just a cosmetic problem that won't spread to other plants. Thanks!

 

I found a couple more pictures from 2008. Hope they help.

 

Try moving it to a more sheltered position.

Carefully.

 

More shelter as in dryer location or warmer location?

 

A humid location protected from frost and dry winds.