Kind of hard to believe this is a sea holly but this enormous evergreen perennial from Argentina definitely is. Long upright soft green spikes leaves emirate from a large rosette to about 3′ tall by 3′ wide. In summer 6′ tall spikes support off white orbicular flowers on tall divided scares. Pollinator heaven. A very dry climate appearance lends it to pair with cactus, Nolinas, even Agaves. Gravel gardens large dry borders. Full sun and very little water once established. Protect from subfreezing wind if an arctic event threatens. High deer resistance. Big bold plant.