nice tent appears to be a 3x3 if i had to guess, nice grow but despite what everyone says i would let them go 3 -5 more days and you will see the sugar leaves twist.
i am not sure which strain your growing but i am willing to bet if you keep some ice cubes on the topsoil and keep temps down for those 3-5 days you might see more purple and the reasons for ice cubes is to trick the plant into thinking the first winter frost has occurred and as a last ditch effort produce more resin etc. yes it works but i use a different method.
lastly am i the only one to notice that your not using an hps for flowering? i presume a 400WMH? (not that its a big deal)
Below are some of my personal pictures, see in pic 1 how the sugar leaves are starting to curl, and in 2 and 3 how they are twisted? that's how i gauge when to harvest, they plants gives you signs of when it is ready, all these people who harvest based on trichs i dont quite agree that it is the optimal way to know when a plant is ready, however if you are trying to determine the type of high you want then harvesting by trichs is a good gauge.
anywho im baked and rambling, enjoy.
