Just an oddball idea...

Can you find a model of a normal potted plant?

Divide it into two groups - the pot and the plant. Bring it into Poser.

Go into the cloth room, clothify the plant, and run a simulation. Find the frame where it's wilted to your satisfaction, and spawn a morph target.

You may well have to select some constrained/decorated verts, and play with the cloth settings.

Good luck!