I don't know how to water my Perlavilla mandevilla plant and let the water drain away once it is in a trained position. At the moment, it is just trailing and I am watering it outside to let the water drain away. I wonder if you could also clarify how to maximize flowering, as another site mentions cutting off the top above the flower.
Watering a Perlavilla Once Trained
Certified GKH Gardening Expert
I'm listing links with care information.
Water when the plant dries out.
I think your referring to pinching back the plant, this will help your plant become fuller and bushier.
A trellis or support is necessary for your plant to grow on.