How long left on this Plant?

Hi Guys,

This is an Indica Dominant Black Domina XXL Auto
Trichs are All Cloudy at this point. No Ambers.
about ~ 3 months somewhere

How long until i should flush? i recon it looks like its got about 1 - 2 weeks left in it.

It looks very hungry why flush?

Very tough to say from these images, but she is hungry, I wouldn't flush rather I would look to lightly feed some Phosphorus, Potassium, calcium and magnesium...…. Is this a soil grow?