"Larry Stoter" wrote in message
We have three tender passion flowers in pots in the conservatory -
passiflora 'incense', passiflora alata and passiflora racemosa. All
are
growing vigorously. Incense and racemosa flowered last year and this
year. Alata still shows no sign of flowering.

Any suggestions?

Just a piece of useless trivia, but in this country (Australia) the
old hands swear that the best way to plant the fruiting passiflora
edulis is on top of a liver (as in the sort bought from a butcher's
shop).