They look like their getting close. What week? What's estimated flower time from breeder? I go by hairs and trichs. Some go by one or the other but it's best to take both into cinsideration. I would say when the hairs are atleast 50% Orange and / or curling in, and / or the trichs are more than 50% milky. Depends on strain (indica or sativa) and your desired effects. If you like sleepy bud, harvest a little later. 75% or more for hairs and 75%milky and some amber trichs. That's my opinion. Hope it helps. Looking great!