Information from the Jepson Horticultural Database for Pinus jeffreyi
Given excellent drainage (modification of compacted or other water-holding soils may be necessary) and full or nearly full sun (tolerates summer afternoon sun), grows especially well in zones 4, 5, 6, 15, 16, and 17
and also in zone 1.
Given excellent drainage (modification of compacted or other water-holding soils may be necessary), moderate summer watering, and full or nearly full sun (tolerates summer afternoon sun), grows especially well in zones 14, 18, and 19
and also in zones 2, 3, 7, 8, and 9.
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