Yes, CANDYTUFTS is a Scrabble word!

Letter values in Scrabble US: C 3, A 1, N 1, D 2, Y 4, T 1, U 1, F 4, T 1, S 1.

Is it a valid word?

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

any of various flowering plants of the genus Iberis cultivated for their showy clusters of white to red or purple flowers; native to Mediterranean region