Tropicals & Tender Perennials: Mandevillas from roots???, 1 by Gitagal

Gitagal wrote:
I live in z-7a. Maryland. YES! We can have a real winter---maybe down to the upper teens or low 20's.

This past Spring I planted two new Mandevillas. Bought them in 8" pots....
Of course--they grew and grew and bloomed on forever.

We have now had frost--so today I decided to cut them back and dig them up.
I was ready to just "can" them--but when i dug them up, I saw all these fleshy roots
which looked a lot like Day Lillie's roots.
Made me wonder if I could, possibly. save these in a dried up--dormant state in my basement
like Cannas or Dahlias for next year. Yes? No?

Any suggestions or advice would be welcome.

Here are the roots as I dug them up. Looks promising to me.....

Gita