There are about 120 species of needle-leafed evergreens in this genus. The species of Pinus are divided into 2 major groups, the white pines which are soft pines and have typically 5 needles and non-woody cone scales, and the black pines which are the hard pines with typically 2 to 4 needles and woody cone scales.
Microclimate
Sun
Shelter
Aspect
Hardiness
Drainage
Moist conditions
Soil Type
Most soil types particularly dry, clay, but preferably not soils overlying chalk or limestone.
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