Jack11

Hi. Hard to say, where is problem exactly, with unknown pH, EC, soil composition etc... But I would bet on nutrients/pH imbalance. Excess of any nutrient can block some others. You fertilized it with P+K only once but still, this amount without enough light and temp. can cause anything, especially with this unstable conditions. Healty plant in week 5 looks 4x bigger than yours (10+ internodes). I have tried indoor jack auto (some others too) for first time in 15L fabric pot under 19watt bulb (from week 3 under 4x19w bulbs), and its really not comparable. From week 3 it was really crazy (started LST after week 2, because plant already had 6 pairs of leaves and was 15cm high) and each week it grows exponentially faster and faster. Every week defoliated 2-4 fan leaves big as hand. What I want say... Fast growing healty plant is not so vulnerable towards any small mistake or small amount of pests. And about nutrients feeding: "less can be more" Good luck, I am looking forward to this/next week ;)

Hi. Now with more sun, are tops of plants looking much better :) Now you can gently fertilize with some grow nutrients. Start with 1/4 of dosage your bootled food (fishmix, rootjuice, bioheaven). Next week 1/2 dosage, 3rd week full) I am using biobizz too... The smallest plant with thin stem can you still supoort with additional soil. I see you still have 2 inches place for soil :P You can add soil into all pots. Cotyledons are now useless so u can cut them carefully or if you want add soil upto them. If so, mix some (10-15%) perlite in new soil layer. I see that crack in soil, it does mean that you have too heavy soil. Perlite can help... What soil do you have in pots now ? As top layer, you can use now fertilised soil mix (all mix if you like biobizz, or equivalent) Every watering lower layer receives nutrients from top layer... Main stem will grow some new roots in this layer in 2-3 weeks. p.s.: sticking wooden supports are dangerous because you can hurt tiny micro roots. So next time you can try wire with eye inserted 10cm away from roots, same which you made for LST, but only for supporting, not for bending.