Need some help with when to harvest

So I planted my seed without research and it is now about a foot tall and flowering. Long story short it's a small outdoor plant. Ive been trying to figure out when to harvest as I don't have and magnifier to look at the trichromes and the off season planting makes me weary to try and timeline it. It has been flowering for a couple weeks and the trichromes were visible about 4 days ago. Any ideas as to how to tell when optimum harvest would be. Pics hopefully are below

i cant see the pictures, but if its only flowering a few weeks let it go another month at least

Here is a link to a site that goes into detail. Examining the Trichomes is the method I use and I assume is the standard.

http://www.cannabisculture.com/v2/articles/4822.html

But it details the other factors to look for.

Ended up getting a 60x magnifier. Thanks for the help