I have purchased mandevillas every summer for the last several years. I overwintered one and it survived pretty well. That is, til I repotted it.
The vines seem to do much much better if I do not repot them. If I buy one and then repot it, it is stunted for the whole summer. Do these vines like to be root bound or do they just not like to be disturbed?
I'm overwintering one this year that I did not repot. I'm wondering if I should leave it in the same pot or if I will have to transplant. Has anyone just dig out some dirt from the top and replace with fresh and be successful?