Some strains will not show amber trichomes in any concentrated area until the plant is fully dead. This does not really happen until it's been hanging chopped long enough for it to dry to a certain degree. Plants don't die till the water stops moving towards the top of the plant. I don't even use trichomes as a determining factor anymore. Nor do I rely on pistil color. When a plant is in full swing of flowering, the pistils (hairs), will all be white, and long, and appear as a whole to all be sticking straight out reaching away from the plant in search of pollen in the air. When it's ready for harvest, the calyx, or would be seed pods, will swell up bigger than before, and this causes the pistils to recede back into the calyx, making them be short and kinda curly looking. Use the new growth at the tops of colas to see when this takes place. The buds will stop growing at the fast rate you are used too, and seem to stop all together. Sometimes almost every single hair will still be white. When you do harvest this time, notice how after they hang a few days and are dry. ALL the pistils are red/orange. Then look at the trichomes. Allot more amber than when you chopped the plant down. And more turning every day. When the calyx swell, the hairs recede halfway back inside them, and the plant shows no obvious growth spurt over night and throughout the next light cycle or day, in my opinion this is perfect as we can get to harvest time. If course keep in mind that you can harvest two or three weeks either before or after this and still have good results. All depends on the preference of the person smoking the final product. I harvest only the ready buds, and leave the other's till you finish myself. And I like my weed to knock your dick in the dirt. So it all depends on you really. And what you are trying to achieve. Also, I'm just a guy that been growing weed a long ass time. Not momma nature, or God, or anyone special like an expert gangster ass professor of bud. Just trying to help. Good luck. Them buds look trichome thick buddy. Good job. I bet it's some good ass bud weather you chop now. A week later. Or a week before. Smoke one for me homie!!!