Agreed Jonathan, they performed well in the ground in hot and dry Adelaide where I lived for the first 8 years of the project. Where I now live I get a bit more summer rain and decided to quit watering to see what would happen during the last 2 and a half months of the season. Even though they were planted on a slope, they continued to produce without watering.
They can cope with it if they are planted in the ground, but in containers they more easily get stressed so I avoid container growing whenever possible. I just don't get good results in containers - probably because I don't water enough!
Patrina