I am told that the flowers are pale when they open and then take on their "blue" color and fragrance over several days. We'll see. This flower sort of reminds of my C. Dinard 'Blue Heaven'.
The flowers of the Spanish moss are tiny. I do fertilize my moss along with everything else. The hose-end sprayer makes doing so easy. I am sure that's why my moss is so lush and grows so fast. I don't think it influences the flowers though, unless it makes the moss flower more abundantly.
C. Caribbean Skies
C. Dinard 'Blue Heaven'
Lime-green flowers and seed-pods of the Spanish moss