How to take care of a purple passion vine?

last summer i planted two purple passion vines along the fence in my backyard and they seem to be doing pretty well. they are lush and spreading very fast. however, i dont get many blooms. i see the buds growing but they never fully develop. they fall off before they mature and bloom. i live in corpus christi tx and the sun gets hot here. how often should i water and feed the plant? the leaves are large and very green. it's a beauty but i want more blooms then it's producing. also, there's a china plum tree (?) seperating the 2 vines and they both have seemed to have stayed away from the tree. they are growing in the opposite direction. is that normal? i know i should have done my homework before purchasing the plants. but i couldn't believe i had finally found it after searching for so long. i couldn't help but snatch it up. i love it and want to keep it. so far there has been no fruit, that i do know. can you help? thanks.

How to take care of a purple passion vine?
Location

Care for the passion fruit vines requires full sun except during those very hot summer days, if possible provide some partial shade. The vine is a fast grower and can get out of hand, so if possible plant it next to a chain link fence or on a trellis.



Water %26amp; Soil

Passion fruit vines grow in many soil types but make sure that the plant gets excellent drainage. If you want to keep the vines flowering almost continuously, regular water is necessary. The vines are shallow-rooted, and will benefit from a thick layer of organic mulch.



Fertilizer

Passiflora vines are vigorous growers and require regular fertilizing. Stay away from just using a 20-20-20 liquid food. This may promote good growth but possibly too much green and not enough flower. Use a fertilizer with a ratio more along the lines of a 2-1-3.



Always remember when buying plants...

Find out when your nursery receives new shipments

Look for clean undamaged foliage

Inspect the plants for good root systems

Don't let them hang out the window on the ride home

Don't let them sit in the car while you run into the store.

They must acclimate to their new environment