Awesome chowder! How old is this plant?

Also, it might have been the 10-15-10 that finally kicked in as lightly spraying the top soil with something stronger I wouldn't think is going to get it down into the bottom roots which it seems like it'd have to do to do any good. Just my thoughts.

You could've also foliar fed them and possibly had some success. Gets to everything way quicker that way. Problem though that they say about foliar feeding when a plant is flowering is that it increases the humidity in the flowers and sometimes promotes mold. I saw some pics of moldy buds and they looked bad. The guy had to cut a lot of the bud away and toss it as inhaling mold isn't a real good thing to do if you're a human.