Flushing for harvest

It seems overnight the pistils on my plants started to turn red, the trichs are still mostly clear with about 50% red pistils. My questions are: How much time before projected harvest? Do I need to leach the soil of nutes and how many days before projected harvest? Should I leach thoroughly until water runs clear? Can I feed regularly until I leach or should I ween them slowly?
Replies are much apprec.. I need to water or feed now...sorry to rush.
Many Thanx and Respect.

This is the closest I could get

stop feeding,water with plain pH adjusted water(6.2-.5) only from now till harvest,wait for the thrichomes to turn opaque to slight pink or amber,then flush about 3 days before harvest....bonbon

http://growguide.klozitking.net/flush.htm
http://growguide.klozitking.net/harvest.htm
http://growguide.klozitking.net/curing.htm ....bonbon

Thanx for the reply bonbon.... I'll spark one for you!

Ohhhhhh....forgot to once again thank you for the pyrosol suggestion, I'm very pleased with the outcome!