"To encourage blue hydrangea flowers, grow the plant in soil that has a pH of 5.2-5.5. If the pH of your soil is naturally higher and therefore alkaline, it will be very difficult to get blue ...

Certain cultivars, like the 'Pugster Blue', produce deep indigo-blue flowers, while others lean more true purple, red, white, pink, or yellow. Butterfly bushes grow well in hardiness zones 5 to 10.

A Blue Alert could also be put in place when a suspect poses a threat to law enforcement, or when an officer is missing in the line of duty. The alert was created with the National Blue Alert Act ...