Passionflowers can be grown from seed, or cuttings. I personally haven't ever tried from seed, though I have a stash of a few different sorts of passiflora in case I get brave. I've grown several from cuttings, with which I have mixed success-- they either take off or they kick the bucket pretty quickly. But many people grow them from seed effortlessly (I'm just impatient, I guess!) But in our zone, passionflowers are pretty easy to find at reasonable prices. Even Home Depot carries them sometimes. My smaller ones are in one gallon nursery sleeves, and my largest ones are in 5 gallon containers. They're usually pretty heavy feeders, though I don't often fertilize at all. Regular watering, most like full sun, though some are a little less tolerant of sun. Part sun would work for any of them, really. Go for it! Amanda 'romando'

Great list of questions! Thanks for the general framework to think through my decisions here - super helpful. We have a very small backyard in which I am constantly tinkering - the back fence is a pretty prominent feature because of the size of the yard - and right now it's still dry dusty dirt mostly except for the two veggie beds, and the giant orange tree. So, to answer your questions: -I am very "into" gardening (borderline obsessed maybe?) though new to it, happy to trim a couple times a month; - I don't need flowers all the time - seasonal flowers I think are appreciated differently/more in fact, but either is fine; - flower debris is fine (I would probably just let it fall into the beds and become mulch around the other future-plants if possible? Also happy to sweep them - orange tree drops loads of debris it turns out); - our yard backs up to a concrete garage pad and concrete walkways at the backs of the other properties, so I don't think it could creep anywhere really - as long as it doesn't shoot vines 20 feet underground; - I am concerned about invasive plants generally and invested in native plants in our front yard - so don't want to plant anything that will get eaten by birds and dropped into Griffith Park (Pampas grass, tree of heaven, ice plant for instance are all terrible) - I am also somewhat impatient - less so in my front yard where I've planted for the long-term and happy to wait - backyard is like an extension of our living room.... in the pic you can see the fence and the orange tree and patio relationship - I also need to be mindful of orange tree roots too... you can just barely see the dichondra, salvia and penstemons I just bought and am trying to place in front of the fence....oh and the lovely view of the neighbor's garage...;)

You asked about moonflower vine. I grew white morning glories and moonflower vine on the same wooden arch. In the morning, I had blooms from the morning glory and in the afternoon, I had moonflower vine. It was fun. They both were white, neither are fragrant. My hummers enjoy mandevilla--I have to "winter it over", but it's not an annual. Eden

Lary, have you tried asking over in the vines forum? They would have some great answers for you. I have a 4 x 6 trellis and asked the same question. Out of all the suggestions, I think I will try scarlet runner beans and get both blossoms and veggies! Your 4 x 4 trellis is not very tall so surely you should stay away from the Morning Glories. You try a mandevilla and bring it inside over the winter. I also grew two cypress vines last year and was displeased. They absolutely swamped everything in sight with greenery and didn't bloom until September. It looked like I had hulking green monsters standing in my flower beds!