Like I’ve said before, art is always a personal thing, so if you like it go with it and don’t worry about what everyone else thinks. Is there a meaning behind it or just fancy the idea?
If you want my two penneth worth then flowers can symbolise death as much as the grim reaper does so don’t see any reson at all why it would be wierd. Just find a good artist/tattoist that can tie it all together for you.