Given that I have about 15 Sago's on my property, after 22 years in Zone 8b, I can assure they do quite well. I have two varieties but I have not taken the trouble find out their names. Deer would never eat a sago. The fronds are sharp and prickly plus the sago is poison to some animals. Further the moisture of the sago fronds is very low and would not appeal to a deer. I do not pretend be super knowledgeable of plants but I do have 400 or so plants consisting of 107 varieties in my yard. I also probably tried and pulled up another 30-40 because they didn't do well in a variety of locations and soil conditioning.
Bottom line is the Sago should have been listed. If not the sago then something. Perhaps the screener thinks the sago is a tree or something. At any rate I am going to give a Red Yucca a shot along with a few "Pinkie Hawthorns.
In my search criteria what do you think was the killer that caused me to get no listings?