Come, my friends,
'tis not too late to seek a new world. Push off, and sitting well in order smite the sounding furrows; for my purpose holds to sail beyond the sunset, and the baths of all western stars, until I die.
Tennyson, "Ulysses"
It's a brilliant sunny day with huge cumulous clouds. The flowers and vegetation are probably darkened somewhat from the clouds and tend to blend with the overall scene, limiting the tonal range and brilliance of the actual colours.
It's a tough one to correct without blowing the brightest of the clouds but it can be done.
It's a lovely shot and well worth the additional steps.
I'll PM you, Aaron.