Passiflora is a large genus with over 500 different species from South America to Australia and Southeast Asia, according to Purdue University. They are woody, perennial vines and many varieties bear yellow and purple passion fruit, a popular juice fruit. Varieties of Passiflora range from tropical to subtropical, but some subtropical Passifloras will not flower below 2,000 to 3,000 feet. Passiflora needs to be pruned to keep from becoming invasive.
Remove by hand any spent flower blooms when they fade.
Cut off any dead, damaged or diseased foliage in the late winter with the pruning shears.
Cut back the Passiflora vine to healthy stems with the pruning shears. Healthy stems have many buds on them and will allow the Passiflora to retain vigorous growth come spring.