J. conferta ‘Blue Pacific’ – Also called Blue Pacific Shore, this slow-growing, heat-tolerant juniper has handsome blue-green ...

Trees need a certain number of warm days in their growing seasons to grow properly; otherwise, the cell walls of new growth ...

Blue growth rings in woody plant stems indicate years when cells failed to lignify properly due to summers that were too cold ...

Strange blue rings found in Scandinavian trees leave scientists perplexed - Rings hint at unusually cold summers in Norway ...

Learn more about these signs of summertime cold, perhaps tied to volcanic activity in 1877 and 1902.

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 ...

How extreme weather leaves a lasting mark on trees and shrubs POZNAŃ, Poland — In the Arctic’s harsh borderlands, where trees ...

Scientists studying pine trees and juniper shrubs in northern Scandinavia are revealing the weather of the past by looking at tree rings — which can tell us far more than just the trees’ age. ‘Blue’ ...

In Norway, scientists have found blue rings in trees that hint at how volcanic eruptions disrupted growth throughout history.