Thank you for the offer! However, I think I’ve given up on Passiflora here until someone else succeeds first. They just seem to need too much heat.
I would not cut them back so soon, though… they may expend their stored energy trying to grow this fall, and have even less chance of sprouting in spring. I’d wait until there’s a frost in the forecast, personally!
Here’s one of my healthiest, most vigorous third-year maypop seedlings. This is about as big as they get outdoors for me so far, but maybe the root mass will slowly grow until it reaches a threshold that allows it to grow better in a season.
I meant to respond to this part before. Have you tried root cuttings, or just stems? I used root cuttings and it was basically 100% success. But that’s with incarnata which is definitely more prone to spreading by the roots than your typical Passiflora, so that might be why.
Just stems? Mine have never made more than just 1 stem. I only grow the edible ones
If you dig up some thicker roots, they might sprout shoots if put in a pot on a heating pad? Just a thought.
