Newbie HELP when to start flushing??????????

Hi all, This is my first grow im doing big buddha s.a.s autoflowers they are 8 weeks old, The packing say's 8-10 weeks flowering time, 50/60 percent of the hairs are orangey/brown I've brought canna flush to give them a 2week flush but dont know when to start it? If i start now the plants will be 10 weeks ond when i finished. Does anyone know when i should start? and how far off finished they look?
Thanks for any help
Smokie

No need to flush. Total myth....

If you're in soil, no flush.

Yeah im grwoing in soil no need to flush then, How will i know when there done?

smokie1411 said:

Yeah im grwoing in soil no need to flush then, How will i know when there done?

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When all of the white hairs recede back into the bud and it's orange hairs.

You can do the whole "trich color" thing, but I personally think it's a bunch of hooplah. Just cut them when they are ready, flushing isn't going to make a sign pop up above the plant saying "DONE".