Partial shade. Evergreen, with stiff cycad fronds which grow quite large, mostly without a palm-like trunk. Very frost hardy; in recent winters, dioon outperformed sago palm, with no leaf damage at 14 degrees Fahrenheit.
Like sago, dioon is not a true palm but a cycad, an ancient plant. It tolerates limestone soils and tough conditions, but requires moisture to establish; drought-hardy thereafter.
All parts are poisonous if ingested. Sharp edges require careful handling.
