Yes, CROCUS is a Scrabble word!

Letter values in Scrabble US: C 3, R 1, O 1, C 3, U 1, S 1.

Is it a valid word?

CROCUS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

any of numerous low-growing plants of the genus Crocus having slender grasslike leaves and white or yellow or purple flowers; native chiefly to the Mediterranean region but widely cultivated