How can i tell when my outdoor plant is ready to harvest

Growing Help
1

Growlog link: [paste your link here]

If you don’t have a growlog please answer these questions.
What strain are you growing? Is it Auto, Fem or Reg?
Are you growing Indoor or outdoor?
Are you using nutrients? Which ones? How much?
Its an outdoor plant. No nutrients and i am unsure of the strain

2

First you go by the hairs on your bud, you want them to turn orange/brown. Then you will need magnification to look at your trichomes, you want them milky-amber.