I don't know for sure. On one that is 10-10-10. the first one makes the
greenery come out, the second 10 makes the flowers and fruit come on, and
the last 10 is for roots. At least that is what I have been told and read.
From that, I would say the nitrogen portion is the one that helps branches
grow and become stronger.

Dwayne


"Clayton" wrote in message
ups.com...
What Fert. Componet (nitrogen, boron etc.) increases branch production?