Since trees and shrubs can live for hundreds of years, identifying these blue rings allows us to spot cold summers in the past. By looking at pine trees and juniper shrubs from northern Norway ...

This shrub is hardy in zones 5-8 and thrives in ... are well-known and well-loved by many for their vibrant orange and blue flowers that resemble tropical birds, not to mention some wonderfully ...

Overall, only 2.1% of the pine trees' rings and 1.3% of the juniper shrubs' rings were blue; the cells which hadn't lignified properly were mainly found at the end of growth rings, in latewood ...