Not sure if this is still active but I wanted to explain my experience with p.edulis. I grow mine in a container so I can bring it indoors in the winter time (in Seattle). I got a grow light for it and it was growing really well indoors, but it wasn’t producing fruit, then I changed its fertilizer and quickly after, I started seeing flower nodes appearing (indoors), it needs higher amounts of potassium, and lower levels of nitrogen (organic tomato fertilizer does the trick), with this fertilizer I successfully got my passion fruit to flower and produce fruit, indoors. The grow lights I got where sansi 36w LED bulbs. It has 2 over it. It continued flowering outside and now has about 10 fruit on it. I’m so proud of this plant!