When do I feed bloom outdoor?

[tahitiracer]

Do I start to feed bloom at the first sign of flowering? I'm in northern ca. I was told to start the bloom September 1st, but my outdoor purple trainwreck is starting to flower now. Can someone please help a newbee out.
Thank You

 

[Noonin NorCal]

If she's flowering go for it... Mine are probably a good 2 weeks into flowering already, my clones are just now spitting out hairs

 

[stonedbuddha]

I'm also kind of curious about this. My plants are spitting female primordial flowers (double hairs at nodes), but haven't initiated white hairs on top yet.

Should I continue my typical veg nutrients until I notice flowering appear, or will dropping the nitrogen out of my cycle help initiate flowering?