Answer: Assuming your growing season is long enough and the plant is healthy enough to bear a crop, you will probably need to hand pollinate it to achieve fruit set. Fruit of the main fruiting varieties takes about three months on the vine. Depending on what specific passion fruit you planted, the fruit may or may not be fleshy as opposed to basically seedy. Pruning would normally be done in the spring to stimulate vigorous new growth for the season. If you have to prune it in the fall, do so after you harvest the fruit. Whether or not you will be able to do this in your climate without a heated greenhouse is somewhat debatable. Here is cultural information from the California Rare Fruit Growers you may find helpful.
Good luck with your experiment!
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