Why have you not planted this Hibiscus already. You do not have to wait for roots to form and 2 years is way too long. It should have been in a pot a couple years ago.

thats a bit odd that there are no roots. i took a small cutting and put it in water. it did grow roots....but was also using a rooting hormone. it is also recommended to cut away a bit of the outer layer to expose the inner stem where the roots will grow from.