First of all , my english is not the best. i will try my best to get it right , somehow 😋. You need to switch your light cycle to 20/4 or at least 18/6. 12 hours arent enough for autoflowers. Also lower your Lamp to 18-22 inches 😉. example for soil, growing with Biobizz Allmix your plant will need some food after 4-5 weeks . if you use BioBizz Lightmix you will need to feed your plants after 2-3 weeks. after 5 weeks of 12 hour cycle, the plants didnt had that much time to grow properly . there was no vegi phase at all , so they started to overflower already...they need some more nutrients (food) , i think your PH is way to high , so that stops the plant from gettin nutrients . lower it down to 5.8 to 6.5 asap . Next run try to keep the 20/4 light cycle , hold the lamp at 18-22 inches the whole grow , use 9 pots a 14 Liter on a grow tent with 1,20 x 1,20 x 2,00 , place the seed from beginning into the soil , 0,5 to 1 cm deep , use BioBizz Allmix and I guarantee you you will get a very good yield with some incredible smells and tastes 💪