Illia

None of these are hardy at all. I believe people in CA can grow either species year-round, but light frosts will kill P. pruinosa. The only "annual" nightshade I can get to withstand frost is my Litchi Tomato. ( Solanum sisymbriifolium )

I grew a bunch of P. pruinosa again this year in my greenhouse, and as usual got great production, great fruit, and no disease/fungal issues. My plants with my experience did much, much better this year than last. We had our first hard freeze about a week or two ago, so it killed the mature plants but I "rescued" some volunteer starts/babies and they're now growing in my house as a winter experiment.