Born on the same day but not twins riddle

Riddle me this:

Born on the same day but not twins

Two babies are born from the same mother,on the same day at the same time, in the same month, at the same year and yet they’re not twins.

How can this be?

Because they are in a set of triplets.

I come in many colors, from yellow to white. But come Valentine’s Day, giving red ones is right. What am I?

Roses.