In a nutshell, if the soil is acidic, the flowers will be mostly blue but if it has a neutral to alkaline pH, the result will usually be pink blooms. Now, there's a common tree that may be growing ...

If there are other factors affecting the tree (such as root damage due to ... hydrangeas tend to produce blue flowers. If you want pink flowers, apply lime to the soil around your plants now ...

The lovely blue flower is blooming in other areas as well ... The nemophila there surround a cherry blossom tree planted to celebrate the two consecutive Olympics gold medals won by local figure ...