Information from the Jepson Horticultural Database for Plantago maritima
Given excellent drainage (modification of compacted or other water-holding soils may be necessary) and moderate summer watering, grows especially well in zones 14, 22, 23, and 24.
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 15, 16, and 17
and also in zone 5.
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