Dry well draining soil. It survived being dried out right? I often forget to water mine untill their tendrils droop.. They're doin' just fine.

Seeds? Plant 'em. Keep 'em warm. Wait. Wait s'more. Wait even more. Decide they're not gonna sprout & set that planter outside. 6 months later (15 to 20 months after planting the seeds..) find seedlings in that planter. Have no idea what they are. It happened to me.
Thus, never give up on passion flower seeds.

The one thing to remember is that most of the time you get flowers much faster from cuttings than you do seed. I have some seedlings that did not bloom for a couple of years whereas cuttings most of the time will bloom as soon as they get a little size on them. I have one plant that I am about to toss that is three years old that is a Vitiflorea/Constance Elliott cross that has never bloomed.

Patsy

Patsy is correct-

Cuttings "think" they're as old as the mother plant, while seedlings have to become mature. And some seedlings never bloom. Ever.

Check out
http://www.passionflow.co.uk/seed1.htm re seed

and the link below re cuttings

Myles

Here is a link that might be useful: Passiflora cuttings