I have five granadilla (Passiflora ligularis) grown from seed this year. How long does it take for them to bloom and bear fruit, assuming they receive proper light and watering?
It depends on your cultivar and your climate. In this article they say (quote:)
How long does passionfruit take to fruit?
That depends on several factors. The tropical varieties fruit quicker then the purple passionfruit.
Any passionfruit will reach maturity sooner if growing in a warmer climate.
A passionfruit vine planted in spring fruits sooner than a passionfruit planted in autumn.
In ideal conditions (early spring planting in the tropics) you can get fruit within six months. Autumn planting in a cooler climate means you may have to wait for over 12 months.
According to the article I refer to, the plant (vine) is a fast grower, so ideally when you plant them next spring you'll have fruit within 6 months. That is theory of course. Probably your plant has to be large enough first, which may take a year (or more).