GC - Blue Forestberry

The increase in rh during flowering is due to the massive increase in perspiration during flower, all veg growth stops and everything is devoted tooooo flowers, Humidity will always rise to the top of a grow tent, along with heat. Tent air outtake should be as high as possible, while Intake should be low. Humidity at top of tent will be around 20rh higher than the bottom or thereabouts. Make sure to take readings from various parts of tent and not making decisions based on one reading from one area. It's vital that there is good air circulation in entire tent. I chained a portable dehumidifier to top of my grow tent, buy a extra bar to reinforce the tent if it's heavyyyyy. Most portable dehumidifiers come with a universal extension for drains. Just run rubber hose to a 5 gallon jug and empty every couple days. It's actually a very good way to measure when to water next. Also good to make sure your fan has adequate CFM cubic feet per minute for the space you plan to clear in the time you want it cleared. If you add carbon filter or have any distance over 12 ft use substantially more cfm than is required. 4x4x6=96ft 100 cfm +carbon filter 200 cfm + distance to extract over 15ft 300cfm or additional fan. Idea is to create negative pressure (sucks in) within the tent so you extract the entire tent within a minute. Set timer to 1 on 10 off or whatever works for you.

Your plants are looking great! Don't over think it. I would keep the LST in place that has all ready been done, and just it grow out as is now. The canopy is nice and even and everything is frosty. Just need to wait for it to thicken out a bit. Some plants don't stretch a lot and that part of it is mainly done in the first 3 weeks of switching to 12/12. Give it lots of light and keep up your feedings the plant will start to thicken up in no time. Check out your PPFD and par map for your lights. Maybe you could lower then 2-4" and get a higher DLI. Best Of Luck and Happy Growing!

Keep the lights at 100%, cannabinoids and terpenes are more important than colour. Anyway, to encourage colour change, which can not be guaranteed, the temps between day and night are the ones that matter, not just cooler day temps. To get this to happen there needs to be a 10-15 degrees Celsius difference between day (lights on) temps and night ( lights off) temps and this needs to occur for 3-4 weeks before anything happens. It only affects leaf colour too, (and is an accumalation of anthocyanins or pigments, which have no effect on potency), so once trimed there is little to even validate the experience. Flower (calyx) colour is another thing all together and is largely a function of genetics. If you want purple buds, you need to buy a strain that has the genetic dominance for doing so. Hope this helps, Organoman.