Mystery Seed Outdoor Winter

My smallest plant is starting to turn purple! It's always exciting when you don't know what you're growing to see changes like that. Past crops of my mystery seed have been potent indicas when they turn purple. I'm hoping for that this time around too. No nutrient feed this week, here's the stats on each plant individually. P1 (looks like indica) Around 3200 PPM, 5.2 pH P2 (starting to turn purple) Around 5100 PPM, 5.1 pH P3 (Probably sativa or hybrid) Around 3800 PPM, 5.3 pH P2 has always had a higher PPM, no signs of burn though. I just don't feel the need to add anything with the PPM for each plant being so high. I still think I'm about a month or less from harvest so I'll leave them as they are until I do a flush water change. Starve them for the last week or so. I took lots of pics this week and a video that I think turned out pretty good. Very photogenic plants right now. Buds look great, they're bulking up really well and trichome density is fantastic. They all smell really nice right now, each has a different scent. Outdoors the smell isn't overwhelming, especially with the small plants, but when I walk up to them I can smell them from a few feet away. A small nugget tore off of P1 when I was trying to remove a leaf that was curling up, I'm going to dry it for a few days and use it as a test smoke. Lots of trichomes even on the leaf that was curling.