Eryngium planum Plant Data Family Name: Apiaceae Common Name: blue sea holly, flat sea holly Other Name(s): Eryngium planum Hardiness Zones: Zone 4: (-34 to -29 C) Plant Code: erpl Flowering Time: Aug, Sep, Oct, Flowering Color: Blue, Leaf Arrangement: Basal, Leaf Shape: Oblong, Ovate, PlantSomething BC Wholesale Listings No members have selected this plant.