11.   An acidic soil will promote blue flowers.

12.   And no blue flower is more beautiful.

13.   And to make it really confusing, most so-called blue garden flowers have purple in them, from just a hint in chicory to quite a bit in catnip.

14.   Arp is another hardy variety that caught my eye, with gray-green leaves and light blue flowers that bloom in the spring on old wood.

15.   Blue flowers can be tranquil or melancholy, dark as denim or light as the sky, restful as twilight or restless as the sea.

16.   Blue flowers look good with all other flowers.

17.   Blue flowers sparkle in spring.

18.   Blue flowers look their best in shade or on an overcast day.

19.   A delicate blue flower in August is a zephyr in the doldrums.

20.   But above all, blue flowers are sought after.