It’s blatantly not good enough in its current state and is totally outperformed by Regrowth. In addition to sharing a node with Grove Guardians, exacerbating the issue of being an absolutely worthless talent pick.
It either needs a complete rework in how it interacts with HoT spells, perhaps specific benefits for each unique HoT or Nourish becomes a proc chance for Regrowth - essentially becoming an empowered version similar to that change they are making for Shamans Frost Shock/Ice Strike.
Whatever the fix may be, it can’t stay like it is right now, surely?