Yellow low leaves- plant is using up its Nitrogen stores. Leave the leaves on and let them drop off naturally so the plant can get maximum access to the stored nutrients.

For all the 'how long to harvest' questions... Flowering time can be anywhere from 6-12 weeks depending on strain. So from the day that you found the females, 4-10 weeks or so. Since most people don't have patience to grow a 12 week flowering Thai, and 6 weeks is not common, I'm going to put my money on 6-7 weeks after you find the girls, then get out there with your scope and look at trichs until your eyes cross.
stinkyattic Reviewed by stinkyattic on . How much longer till' harvest? You tell me! This is my first grow ever and it's an outdoor one. My friend gave me this plant because he left the country and now it's been sitting on my porch for about a month. It's in a spot where it gets the most sun possible. I've been watering it whenever it doesn't rain. Now I noticed that it started flowering. Or at least it looks like it to me. Did it? I attached some pictures so you guys can tell me how far it's along and how much longer approximately I should wait till harvest. My Rating: 5