Well I a not sure I can help you but Arizona is pretty far South. I grow a lot of cape bulbs and have been very sucessful for over 15 years. I live in the wsetern side of the Phoenix Valley. We have temps that can get to over 120F and down to high 20's in the winter. Rain is very sporadic, mostly winter and late summer. I grow mostly in containers, many Cyrtanthus are in gallon plastic pots and are watered every other day during warm (plus 85F) weather and they are in full sun. Most of my bulbs get part shade during very hot times. Crinum are very easy to grow many are in 2 gallon pots. They are lush and growing very rapidly now. Many bulbs that need a dry summer rest just go dormant when they get too hot. My bulbs are under metal canopies so it is easy to keep them dry.I have found some bulbs adapt to the heat better than others but I don't remember any total die offs. Hope this helps-Russ H