She's really blown up this week. I thought she may have started her stretch on day 18 and today confirmed it. Pistils have appeared and she should be fully into flower by the end of week 4. I've begun some leaf tucking but that's all I have planned. Time to buckle up and enjoy the ride.
@gottagrowsometime, I've never had a plant flip this quickly but I have multiple strains going and all look to be entering flower so it must be something environmental. Hopefully with the stretch she will still end up a couple feet tall.