Passiflora edulis

Native to southern Brazil, Paraguay and northern Argentina, Passiflora edulis, the Edible Passionfruit is something of a challenge in the UK even for experienced Passiflora growers. It is not hardy and must be kept frost-free. A plant that is so easy to grow in the warm humid temperate climate of - say New Zealand - becomes an infuriating prima donna in the cool temperate climate of the UK. When it is young and still relatively small it can be overwintered in a well-lit kitchen or bathroom although care should be taken to make sure it is not over-watered at this time - in fact, any watering at all during the dark winter months is risky and the plants should be given a good last water in November then kept dry-ish until the early Spring. Once Spring growth recommences it is usually vigourous and the vines need good support in a well-lit but not overly dry environment. Sun-rooms and conservatories are often too dry and you may need to move this temperamental Goldilocks plant around until you find the right spot for it. This of course is not exactly practical for a climbing plant so in the early first years a largish pot with its own small trellis or support canes is often a good solution. Sun and humidity are the ideal combination. When in full growth, water and feed it well. Regular applications of seaweed and liquid potassium-rich fertiliser will steer it towards the Holy Grail: flowers and perhaps...maybe... one day... fruit!