1.   Violet light was cooler and red light warmer than the others.

2.   Ultra violet is one of the easiest ways.

3.   Roses are red, violets are blue.

4.   Scented violets would be lovely, of course, but I am content with the less-demanding habits of dog violets.

5.   True violets are perennials.

6.   Violets are blue.

7.   Violets are another Valentine flower.

8.   Violets are difficult to germinate and slow to grow from seed.

9.   Violets are black.

10.   VIOLETS ARE BLUE, by James Patterson.