Hi ursine

I not a soil grower but one thing I have seen StinkyAttic mention in the past is the distance between the top of your pot & the top of your soil. You seem to have quite a deep lip on the pot & I'm sure she has posted you want the soil as close to the top as possible in order to increase airflow around the base of the plant. As I say sure this is something I have read maybe another soil grower will confirm.

Good luck with your grow.