Can I cut a Diladenia plant in half and repot in two containers and will they survive?
Certified GKH Gardening Expert
I would wait until early spring to divide the root ball.
Yes, Dipladenia can be propagated by seeds, cuttings, or dividing the root-ball; however, most new plants are produced from softwood cuttings taken in early spring. Here is more information: https://www.gardeningknowhow.com/ornamental/vines/mandevilla/mandevilla-propagation.htm For more information on cuttings, check this article: https://www.gardeningknowhow.com/ornamental/trees/tgen/how-to-root-cuttings-from-various-shrubs-bushes-and-trees.htm