Papaya Zoap Auto

I have no idea what happened. I started fertilizing, 1ml per liter, and suddenly it exploded! It doubled in size, grew new branches and lots of leaves, in fact I had to remove some and "open" the plant more so that all the branches get enough light and oxygen. Without defoliating it looks like a small forest! I think it will grow big, so far everything is going well and the plant is really doing well.