Cold Protection for Perennial Tropical Plants
We've been growing super tropical perennial plants for years outdoors in Zone 9 by following a few simple methods for cold protection.
Resources for Cold Protection
70+ page PowerPoint pdf, Freeze protection of tropical fruit crops in Florida, explains types of freezing weather and what to look out for, methods of cold protection, and a plethora of valuable info.
Irrigation System Descriptions for Tropical and Subtropical Fruit Crops in Florida explains the advandatages and disadvantages of different irrigation-based protection methods.