Zones 5-9. J. procumbens ‘Nana’– This Japanese type of juniper shrub forms a dense mat of prickly blue-green needles that turn slightly purplish in winter. It grows slowly to 6-12 inches ...

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’ ...

Blue Star' juniper (Juniperus squamata 'Blue star') is a dwarf cultivar of singleseed. The evergreen ground cover is a bit more shrub-like than other junipers, forming a dense mound that reaches ...

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.

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 ...