After the cold snap with my 50f - 65f temps and 25-35% humidity for the week. I'm now getting back up to 65f - 77f temps with 35-40% humidity. The nute schedule is Megacrop 4g/gal, Sweet Candy 1g/gal, Greenlife Microbial Chelator 1ml/gal, Greenlife Bloom 0/17/17 1ml/gal, Earth Juice Oilycann Calmag 8ml/gal and a splash of Drip Clean in the reservoir. They are ranging from 15 inches up to 23 inches tall right now. Still stretching so I keep adjusting the clothespin LST and leaf tucking.
I am surprised the light clothes pins still bend branches at this stage of the grow where things are stiffer. When I went looking to try this LST tech out myself after seeing yours I sought out clothes pins I can add weight to. I got these. They have some clip hooks on them. I cut up chunks of fishing lead off a spool and attach to the clips. Dont really need much extra weight, but sometimes it comes in handy. I use the clothes pins for a good two weeks in a grow. Maybe day 15 to day 35. I find leaf tucking doesn't really last and leaves bounce pack fast but the clothes pins keep things in place.