Possible Popcorn Buds?

BIt to early to tell if they will be popcorn nugs, need to give them time to grow. To avoid smaller larfy buds you can strip the lower buds that are not in the canopy something known as lollipopping. Or add in side lighting to help them get the energy they need. It looks like the leaves are also curling up at the serated edge and I tend to see this with heat stress on the plants, the tent is at 31c and 70%RH in your diary and its the upper limit of temps and over limit on RH for budding plants IMO. If you can try and lower the temps to around 24-28c and the RH down to 40-50% you should find they will droop less. Keeping up good airflow is key. I'd say the PH maybe a touch to high as well but the plants look to be doing good with it. So I don't think you need to worry about that. Look up something called VPD. its a chart that helps you find some sweet spots in terms of temps/RH I think this could be a good tool for you. as well as a EC/PPM pen to determine the strength of your feeds. Best to dilute it down to the desired EC/PPM but keep the same mixing ratios. Good Luck!