I would think it is relatively easy. I bought a potted plant one year and have had a few volunteers each year since then.

Thanks NHBabs, that's good to know. I don't mind a plant that volunteers. I wonder if it's drought tolerant?

Last season it volunteered in a pot with a geranium/Pelargonium. It did fine in the moisture in that pot, which I tend to keep a bit dry since they don't like soggy roots. I don't think it would be happy in truly dry conditions since the leaves are thin and delicate.

Thanks again for the information. I was going to grow it in a pot but in my climate it might dry out too much? We hardly get rain during summer and it's frequently at or above 100 for several weeks.

I'm in north central Texas. The moisture polymer sounds like a good idea and I may try that? Since I have quite a few seeds, I may try some in the ground and in a pot? I have an area by my porch that gets a few hours of sun during the morning and early afternoon but then it's full shade by mid-late afternoon. I also have two large trellises in that area too. I'm glad it's not a fussy plant and I'll definitely report back. Hopefully I'll be successful and I even have some volunteers next year. I couldn't find much information compared to the native snapdragon vine.

I just realized that mine was M. scandens rather than M. barclayana. So I don't know how many of my comments apply to yours. The genus used to be called Asarina, so there may be posts or other on line info under Asarina barclayana from sources that haven't updated the genus.

Thanks again NHBabs. I noticed the Asarina when I was Googling M. barclayana. I also noticed on some sites it also spelled barclaiana so that also confused me lol.