Well, in spite of some very sensible (and appreciated) advice, I've decided to take a risk and try planting some (mostly dwarf) varieties, building up soil mounds before planting. The walkway doesn't actually get used all that much, and I'm willing to keep the occasional, inconvenient leaf pruned back. I don't know whether they'll fruit or not, but I'm choosing to be an optimist in that regard.
The comments suggesting I plant in the back yard make a lot of sense, but I'm running low on room back there, believe it or not. I've got mandarins, lemons, an avocado, a cherimoya, a white sapote, a guava, plums, and assorted other trees that all have a fair bit of growth ahead of them I have to account for. I've recently decided to sacrifice some of my raised beds in the vegetable garden for bananas. While I sympathize with those who question the need for a lawn, I also have to bow to the needs of three small children and two not-so-small German Shorthaired Pointers.
Oh, and the Passiflora are climbing the patio cover, along with the grapes!
