Dioon edule from Foremost Co. is one of the hardiest members of the cycad family. It is extremely resistant to all scale insects and hardy to USDA Hardiness Zone 8. It is the perfect replacement to the King Sago. Dioon edule has flat, 3-6 inch wide leaves with fronds that are a nice silver/green color. It grows 3-5 feet tall, eventually developing a stocky trunk.