Auto big buds - second grow

Finally at 5 weeks and 5 days the autos have started flowering. I ran into some issues with one plant having a deficiency and 2 others have nutrient burn and the other being fine. All plants were being fed the same dosage at half the recommended dosage. The 2 showing nutrient burn were the 2...

So, I've now added a Kingbo 600 into the tent. The plants seem healthy but growth on the 2 in biobizz all mix has stopped. Both have been topped and I have forgotten to start adding nutes into their feeds so that might be the issue. I'll start tonight by adding half of the recommended dosage...

the plants are coming along nicely. I've attempted to LST the biggest - not sure if it's right but I shall see. The 2 plants in just a premium compost rather then the biobizz stuff are growing better. Maybe the others had some transplant shock or maybe biobizz all mix is over rated.