What am I?

I am not alive and yet I grow. Just put me next to where it grows. A favorite of the summertime, best with friends when combined. What am I?

related riddles

I move without wings, Between silken string, I leave as you find, My substance behind. What am I?

Turn me on my side and I am everything. Cut me in half and I am nothing. What am I?

I begin your sentences. What am I?