With summer on its way in the Northern Hemisphere, the latest edition of Periodic Graphics in Chemical & Engineering News looks at a popular garden plant, hydrangeas, and how the soil they’re planted in can affect their colour. View the full graphic on the C&EN site and then afterwards test your knowledge with this quiz.
![](https://i0.wp.com/www.compoundchem.com/wp-content/uploads/2024/05/CEN-–-hydrangeas-preview.png?resize=370%2C208&ssl=1)