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

Volcanic eruptions and cold summers leave lasting marks in the wood of northern trees, unlocking the secrets of past climate extremes.

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

The scientists collected core samples from 25 Scots pine trees and stem discs from 54 juniper shrubs, creating paper-thin ...

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

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

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

These rings are not just a visual anomaly but serve as natural archives of past cold summers. Researchers studying samples ...