来自MSN11 个月
10 Best Evergreen Shrubs
But a dwarf variety, Pinus mugo var. pumilio, hardy Zones 2 through 8, is a good choice. It will take many years to reach its mature size, three to five feet tall and wide. It grows in full sun to ...
UC Berkeley researchers subjected dwarf pines (Pinus mugo) to enhanced UV-B radiation in growth chambers for two months. The irradiated pines not only produced malformed pollen, but they dropped ...