How to tell if my plant is done

I don't have a microscope to get up close to my plants so are there other ways to tell when to harvest?

you dont need a microscope. although that would be best....you can use a jewelers loupe...you can find these at MANY places radioshack,online,pawnshops,etc. I got mine at the flea market for $14 and its 30x.I can see the trichs really good.
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it your going to spend 14 bucks on a jewelers loop you might as well get a microscope...

12 bucks at radioshack...

If trying to do it without either of these its going to be a little difficult.

If I was you id wait until 1 week after the recommended flowering period, make sure the buds are thick(depending on strain), and make sure the hairs are red... Other then that you need a scope

Trichs are the best way to tell, but there are other indications too.

When the vast majority of the hairs have turned red, and the calyxes have swolen, you're close.

good luck

Thank you mr ganja...