A call for assistance to all the osmocote users out there.

Locally, we have three formulations available. Triple 14, good for 3-4 mos; 19-6-12, good for 3-4 mos; and 24-4-8, good for 8-9 mos (all at ca. 24 degree C).

I was wondering which formula you folks favor, and whether anyone has used it as a top-dressing when NZ sphagnum is the primary growing medium component. Also, an approximation of how many prills per, say, 10 or 20 cm pot would be useful.