I've seen caeruleas down there (burbank / van nuys) *completely* cover those tall skinny juniper-looking trees... My sis had 10 - 15 in her back yard along the fence.. Couldn't even tell what kind of trees they were.

The bushes along the back of the pool? (Where the helicopters dip during the fires...) Covered.
Neighbor's fence? I think there was one under there...

The vines were as thick as my wrist in some spots- Looked more like 'tree wood' than 'vine'.

I don't think it's the parent vine that's covering the whole thing (in your yard or hers) as little 'volunteers' were coming up all over the place. Don't know if they were suckers or from seed- As hers had fruit all over it as well, some seeds had to fall & sprout.

I'd imagine they might be like the blackberries up here- Give them space, eventually they'll fill it. If it has no natural controls (butterfly larvae, disease, those weird bugs who eat the seeds) & manages to avoid attacks from the weed-eater & lawnmower I don't think it has a limiting factor.

Mine seemed to take off the third year. I was afraid of the plant encroaching on neighboring property, so I placed mine in deep pots. They grow great they way, & are producing fruit. They will probably continue to grow, but you might consider the fact that they could go onto neighboring properties. It takes quite a bit of continual digging to get rid of one, & they are not that difficult to transplant. If an animal ate the fruit, they could also reseed.

I wish I had planted my p. Incense in a container! It has sprouted all over the place and I have to cut it down &/or severely trim to keep it from swallowing my other plants. On the opposite side from where originally planted, it has covered a fence; the problem is that it keeps climbing up a pine tree and onto my neighbor's cable wires so I have to be vigilant and cut it back before it reaches the wires -- never ending job! It attracts lots of butterflies and bees, and has beautiful scented flowers and lots of fruit which I just leave alone. One does get excited about how big passiflora can grow, but be warned as it can destroy other plants and property!

My neighbors made the choice to build a wooden trellis over their sidewalk that is next to the fence that separates our property. The passion fruit grows over my fence and has basically found a friend in my orange tree. I'm in Orange county too and just got a notice about a plant disease that is fatal to citrus trees and has no cure. On my way to californiacitrusthreat.org to find out how to protect my orange tree. The disease is called Huanglongbing (citrus greening disease). Notice sent with my water bill this month.