I am growing 2 Granddaddy Purple autoflower plants. They look so different from the Sativa or hybrid plants that I can't tell if they are ready to harvest or not. Advice please.
well, at least you got a early bird tester. Rather safe then sorry. tbh that part of the plant looks done. I'd just feed a polisher at your stage (ie. K&P, drop out the nitrogen) and let her yellow up some before harvest.
Nice job. Your trichomes still look clear and cloudy. I push most of my auto-flowers for 11 or 12 weeks outdoors. I'd wait a bit longer for some amber trichomes.