These full-sun purple plants sport attractive clusters of flowers and grow to about 18 inches high. ... Top picks: Astra blue and Fuji blue varieties display charming pale blue-violet flowers.

Blue is the rarest flower color, seen on only 10 percent of the 280,000 flowering plants on Earth. Among those who specialize in color analysis, it is sometimes claimed that, in reality, there has ...

Through a bee’s eyes, blue flowers are more common than you’d think — and they could be used to monitor environmental health. The mystery of the blue flower: nature’s rare colour owes its ...