NORTHEN LIGHT

One new top leaf is wrinkled too, so I would go with bad watering regime and overwatering . Pots has to be light before watering them again. All the Best !

All feedback appreciated?............. A bit young for LST, wait until the branches grow more, or after about the fifth/sixth node has grown. Pity you didn't fill the pot right up, there would have been more room for root growth (more roots = bigger plant) and your plant would have got more reflected light had it been higher up, rather than below the side walls of the pot which will block most of the reflected light, limiting growth. A young plant that small should be ok for 4-5 days if given a good soak before leaving, otherwise a simple wicking system with some cotton rope and a bottle of water will look after your seedling. Also way too much perlite, you only need approx 3-5%, probably less if using large amounts of coco coir, its is only needed for aeration and drainage, something coco coir has in abundance. Perlite has no nutritional value, so the less perlite, the more soil and more goodness your plant gets. Also, also, 24/0 is bad for plants, 18/6 is optimal, cannabis NEEDS a dark period every 24 hours to complete its photosynthetic cycle and to have a correctly functioning metabolism. 24/0 could only be recommended by someone who does not understand photosynthesis or how plants function, or maybe neither principle. Everything on Planet Earth is designed to have a routine of activity followed by sleep, it is called a "circadian rhythm". Without one, things go wrong quickly. 18/6 was derived at through 80+ years of research into cannabis and is not a random number. Besides, cannabis can only grow so much during any one 24 hour period and this growth tops out around the 18 hour mark, meaning running your lights any longer than 18 hours is basically a waste of expensive electricity. For prime health, give your plants the sleep they NEED and they will be much more well balanced and happy. Hope this helps, Organoman.

It does look like it. also good work on keeping it happy for a 6day vacation break. Given that it is an auto it will need less feed like you have been giving it. props to you. Maybe it would like a tiny bit less on top of that. Could always push ec back to .7 or .8 for a week till it grows a bit bigger. Is your run off EC good?? This is the reference point i use for auto feeding. its not 100% so if they need more or less you just have to adapt your feeding schedule to it. https://www.autoflower.net/forums/threads/med-man-method-feeding-chart-ppm-ec.47856/ You are right on par with i at .9 for repeating weeks in veg. One thing I have noticed is that when I let my plants dry out more they tend to show more issues, this may go away not that your back and watering regularly. I'd play it safe and down the EC by a point for a week then work my way back up. Best Of Luck!