Hmmm, it is so hard to figure out how long the roots will start growing. Usually new leaf growth is a sign it is growing but per my experience without full set of leaves yet, then most likely you still don't have roots.
I have one that I have been trying to revive and it still has not sprouted new leaves as if it is dormant. So I have it under the mango tree. It is in a big clay pot with 2 actively growing baby seedlings. So any excess water gets absorbed by the 2 adeniums.
